Subject, mainly. I have a test folder I’m using from an event I attended in 2020. It’s a combination of Canon 7D and iPhone shots, including some live photos and a large video. In total I have 52 separate assets and it’s displaying as 44 assets in Photostructure.
I’m trying to parse through all the reasons why one at a time, and the first I noticed (when posting on Discord about a separate question re: bind mount removal) is that PS seemed to consider two different photos with different subsecond creation times as variants. Here is the info output below as well as a snippet of the datetime.

Is there an advanced value I can set to split these apart? PS_STRICT_DEDUPING="true"? That one seems to have other implications with regard to RAW/JPG pairs, etc. so not sure if that’s the best course.
Thanks!
      localCentiseconds: 2020091818154894,
      precisionMs: 10,
      src: 'tags:SubSecDateTimeOriginal'
      localCentiseconds: 2020091818154923,
      precisionMs: 10,
      src: 'tags:SubSecDateTimeOriginal'
docker exec -ti photostructure sh -c './photostructure info /photos/2020/2020-09-18/IMG_2706.JPG /photos/2020/2020-09-18/IMG_2707.JPG'
{
  fileComparison: 'These two files will be aggregated into a single asset.',
  variant: true,
  imageHashComparison: {
    imageCorr: 0.94,
    aRotation: 0,
    colorCorr: 0.99,
    meanCorr: 0.96,
    greyscale: false
  },
  a: {
    _PhotoStructureVersion: '1.1.0',
    cameraId: '["SerialNumber:2671204554","InternalSerialNumber:S1166639A"]',
    capturedAt: {
      date: ExifDateTime {
        year: 2020,
        month: 9,
        day: 18,
        hour: 18,
        minute: 15,
        second: 48,
        millisecond: 940,
        tzoffsetMinutes: -480,
        rawValue: '2020:09:18 18:15:48.94',
        zoneName: 'UTC-8'
      },
      localCentiseconds: 2020091818154894,
      precisionMs: 10,
      src: 'tags:SubSecDateTimeOriginal'
    },
    dimensions: { height: 3456, width: 5184 },
    errors: [],
    exposureSettings: {
      aperture: 2.8,
      focalLength: '17.0 mm',
      iso: 500,
      shutterSpeed: '1/500'
    },
    filters: {
      accepted: [
        'exifExtFilter',
        'fileSizeFilter',
        'notHiddenCheap',
        'noMediaFilter',
        'hasMimeType',
        'supportedMimeTypeFilter',
        'notRejected',
        'minDimensionsFilter',
        'minVideoDurationFilter',
        'shaBlocklistFilter'
      ],
      rejected: []
    },
    ignoredBecause: [],
    imageHash: {
      dominantColors: 'Jet (#343434), Black olive (#3B3C36), Black (#000000), Licorice (#1A1110), Ebony (#555D50)',
      isGreyscale: false,
      meanHash: 'HLw4OHzC/wgEADl/PBweP/n7AoDD8//+',
      modes: [
        690, 694, 658,
        662, 914, 918,
        219
      ]
    },
    lensId: 'LensSerialNumber:0000050bc2',
    lensInfo: '17-55mm f/2.8',
    lensMake: 'Canon',
    lensModel: 'EF-S 17-55mm f/2.8 IS USM',
    Make: 'Canon',
    mimetype: 'image/jpeg',
    Model: 'EOS 7D',
    nativePath: '/photos/2020/2020-09-18/IMG_2706.JPG',
    needsTranscoding: false,
    pathsInLibrary: [],
    priorAssetFile: {
      '$ctor': 'models.AssetFile',
      aperture: 2.8,
      assetId: 35,
      cameraId: '["SerialNumber:2671204554","InternalSerialNumber:S1166639A"]',
      capturedAtLocal: 2020091818154894,
      capturedAtOffset: -480,
      capturedAtPrecisionMs: 10,
      capturedAtSrc: 'tags:SubSecDateTimeOriginal',
      createdAt: 1651258664361,
      fileSize: 9431696,
      focalLength: '17.0 mm',
      height: 3456,
      id: 71,
      iso: 500,
      lensId: 'LensSerialNumber:0000050bc2',
      make: 'Canon',
      meanHash: 'HLw4OHzC/wgEADl/PBweP/n7AoDD8//+',
      mimetype: 'image/jpeg',
      mode0: 690,
      mode1: 694,
      mode2: 658,
      mode3: 662,
      mode4: 914,
      mode5: 918,
      mode6: 219,
      model: 'EOS 7D',
      mountpoint: '/photos',
      mtime: 1600487481000,
      rotation: 0,
      sha: '4wT2swQwaLcSuMVOfudHDJVWbVTFEksH',
      shown: false,
      shutterSpeed: '1/500',
      updateCount: 5,
      updatedAt: 1651265750329,
      uri: 'psfile://2H119wZ3D/2020/2020-09-18/IMG_2706.JPG',
      version: 11,
      width: 5184
    },
    priorIsInSync: true,
    rotation: 0,
    sha: '4wT2swQwaLcSuMVOfudHDJVWbVTFEksH',
    tags: [
      [ 'Camera', 'Canon', 'EOS 7D' ],
      [ 'Lens', 'Canon', 'EF-S 17-55mm f/2.8 IS USM' ],
      [
        'When',
        { name: '2020', ordinal: 7980 },
        { displayName: 'Sep', name: '9', ordinal: 4 }
      ],
      [ 'Type', 'Image', 'JPEG' ],
      [
        'fs',
        { displayName: 'photos', name: '2H119wZ3D' },
        '2020',
        '2020-09-18'
      ]
    ],
    tz: 'UTC-08',
    tzSource: 'offsetMinutesToZoneName from TimeZone',
    uri: 'psfile://2H119wZ3D/2020/2020-09-18/IMG_2706.JPG',
    validFile: 'OK',
    variantSortCriteria: {
      count: 0,
      fileSize: 11,
      isBrowserSupported: true,
      isCover: false,
      mtime: 13337396,
      resolution: 12,
      schemeIdx: 2,
      uri: 'psfile://2H119wZ3D/2020/2020-09-18/IMG_2706.JPG'
    }
  },
  b: {
    _PhotoStructureVersion: '1.1.0',
    cameraId: '["SerialNumber:2671204554","InternalSerialNumber:S1166639A"]',
    capturedAt: {
      date: ExifDateTime {
        year: 2020,
        month: 9,
        day: 18,
        hour: 18,
        minute: 15,
        second: 49,
        millisecond: 230,
        tzoffsetMinutes: -480,
        rawValue: '2020:09:18 18:15:49.23',
        zoneName: 'UTC-8'
      },
      localCentiseconds: 2020091818154923,
      precisionMs: 10,
      src: 'tags:SubSecDateTimeOriginal'
    },
    dimensions: { height: 3456, width: 5184 },
    errors: [],
    exposureSettings: {
      aperture: 2.8,
      focalLength: '17.0 mm',
      iso: 500,
      shutterSpeed: '1/500'
    },
    filters: {
      accepted: [
        'exifExtFilter',
        'fileSizeFilter',
        'notHiddenCheap',
        'noMediaFilter',
        'hasMimeType',
        'supportedMimeTypeFilter',
        'notRejected',
        'minDimensionsFilter',
        'minVideoDurationFilter',
        'shaBlocklistFilter'
      ],
      rejected: []
    },
    ignoredBecause: [],
    imageHash: {
      dominantColors: 'Jet (#343434), Black olive (#3B3C36), Black (#000000), Licorice (#1A1110), Ebony (#555D50)',
      isGreyscale: false,
      meanHash: 'HLw4OHzC/wgGADh9PBweP/n7goLD0//+',
      modes: [
         690, 694, 658,
         914, 662, 918,
        1097
      ]
    },
    lensId: 'LensSerialNumber:0000050bc2',
    lensInfo: '17-55mm f/2.8',
    lensMake: 'Canon',
    lensModel: 'EF-S 17-55mm f/2.8 IS USM',
    Make: 'Canon',
    mimetype: 'image/jpeg',
    Model: 'EOS 7D',
    nativePath: '/photos/2020/2020-09-18/IMG_2707.JPG',
    needsTranscoding: false,
    pathsInLibrary: [],
    priorAssetFile: {
      '$ctor': 'models.AssetFile',
      aperture: 2.8,
      assetId: 35,
      cameraId: '["SerialNumber:2671204554","InternalSerialNumber:S1166639A"]',
      capturedAtLocal: 2020091818154923,
      capturedAtOffset: -480,
      capturedAtPrecisionMs: 10,
      capturedAtSrc: 'tags:SubSecDateTimeOriginal',
      createdAt: 1651258665058,
      fileSize: 9471040,
      focalLength: '17.0 mm',
      height: 3456,
      id: 72,
      iso: 500,
      lensId: 'LensSerialNumber:0000050bc2',
      make: 'Canon',
      meanHash: 'HLw4OHzC/wgGADh9PBweP/n7goLD0//+',
      mimetype: 'image/jpeg',
      mode0: 690,
      mode1: 694,
      mode2: 658,
      mode3: 914,
      mode4: 662,
      mode5: 918,
      mode6: 1097,
      model: 'EOS 7D',
      mountpoint: '/photos',
      mtime: 1600487482000,
      rotation: 0,
      sha: 'C0YjNzjPzn9cNbMw05WoP4M96cxr/z+A',
      shown: true,
      shutterSpeed: '1/500',
      updateCount: 4,
      updatedAt: 1651265750329,
      uri: 'psfile://2H119wZ3D/2020/2020-09-18/IMG_2707.JPG',
      version: 11,
      width: 5184
    },
    priorIsInSync: true,
    rotation: 0,
    sha: 'C0YjNzjPzn9cNbMw05WoP4M96cxr/z+A',
    tags: [
      [ 'Camera', 'Canon', 'EOS 7D' ],
      [ 'Lens', 'Canon', 'EF-S 17-55mm f/2.8 IS USM' ],
      [
        'When',
        { name: '2020', ordinal: 7980 },
        { displayName: 'Sep', name: '9', ordinal: 4 }
      ],
      [ 'Type', 'Image', 'JPEG' ],
      [
        'fs',
        { displayName: 'photos', name: '2H119wZ3D' },
        '2020',
        '2020-09-18'
      ]
    ],
    tz: 'UTC-08',
    tzSource: 'offsetMinutesToZoneName from TimeZone',
    uri: 'psfile://2H119wZ3D/2020/2020-09-18/IMG_2707.JPG',
    validFile: 'OK',
    variantSortCriteria: {
      count: 0,
      fileSize: 11,
      isBrowserSupported: true,
      isCover: false,
      mtime: 13337396,
      resolution: 12,
      schemeIdx: 2,
      uri: 'psfile://2H119wZ3D/2020/2020-09-18/IMG_2707.JPG'
    }
  }
}