Looking at a list of light files and saw there were two files that had the same sequence number. But looking at the fit header info they were different. However the first duplicate files fit's header is a copy of the file that came before.
In the screensot you can see two 0015 files. The first one is a duplicate of 0014.

After seeing this I looked and found this has happend several times and a good number of them has happened at images 14 and 15.
Has anyone else seen this?