On 21 Sep 2018 14:09:49 GMT, Frank Slootweg wrote:

IIRC, you strip the EXIF information from your JPEGs. As a test,
create a few .jpg files *with* the EXIF information intact and see if
*they* come out in order in Paint.NET.

Thank you Frank Slootweg for your purposefully helpful adult post.

You may be on to something, in that EXIF information is certainly stored
inside of some JPEG files.

You are correct that Paint.NET adds EXIF information to any files saved as
JPEGs, and that I use Irfanview to strip out that EXIF information after
the fact (it's just an advertisement for Paint.NET that they put in the
EXIF tags, so it's unrelated to the date EXIF information).

However, that stripping of EXIF information happens only after the edits.

In this case, the snapshots are all done with the Windows+PrintScreen
button, which snaps a PNG file of the entire screen in a named sequence of
"Screenshot (739).png", "Screenshot (740).png", etc.

I don't know if there is a way to get "Windows+PrintScreen" to snapshot a
JPEG file instead of a PNG file, so that I can run a test of what you
suggested.

Googling, it doesn't appear to be possible:
https://answers.microsoft.com/en-us/windows/forum/windows_8-desktop/how-to-change-print-screen-to-default-in-jpg

Of course, it's possible to snap a JPG screenshot with other editors, for
example, Greenshot, but not with Windows+PrintScreen (apparently):
http://getgreenshot.org/