I'm a Bridge+ACR user and rarely use Lightroom, so please excuse ignorance. In Lightroom, I'm trying to sort a large number of images by "Edit Time", so I can find the images I most recently processed. The images are Tifs and jpegs only, stored in many folders under a root folder. Raw files are stored in a different root folder structure.
I've imported all images and pointed Lightroom at the root folder. I select sort: Edit Time and "Z to A" sort direction. What I get is not what I want. Images at top of the display are not the most recent edited. There are 36,000 images under the root folder. I've discovered that the first 268 images displayed are not the most recent, but images displayed after that appear to be in the correct sequence.
The 268 "out-of-place" images at the top appear to be in random order. They are from many folders, and I can't see anything unique about them that might confuse Lightroom. In the metadata there are "Date Time Original", "Date Time Digitized", and just "Date Time". The simple "Date Time" field is clearly the date and time the image was last saved (processed) by Photoshop.
So what is Lightroom using for "Edit Time" in the sort?