Strange bug in importing video files

Has anybody seen this before?...

Importing video clip as elements for compositing some vfx shots together. All clips have a number as a suffix (eg. "_01", "_2", etc.). When I import one file in particular and drop it into a comp, it's length gets shortened, gets a couple of seconds cut off the end.

When I delete it, rename the file with a different suffix ("_2" becomes "_3") and go through the same steps, import and drop into same comp, it stays unaffected.

A little annoying bug.

It's an .mov only a few seconds long. Either way I bring it in it gets interpreted the same way.