A few questions:

1) Does the mod take the snapshots for all the bosses?
2) Did your WoW client crash/disconnect or did you Alt+F4 Close WoW at all on those raid nights
3) If the snapshots are saved, are they missing from the entry page (the one where you choose which snapshots you wish to import)
4) Are the snapshots showing up on the assignment page (the page where you assign points, attendance, etc)
5) Is there a particular boss that's being omitted? Or does it seem to be random?

.....that IS odd. I don't suppose you have a copy of the file you uploaded that didn't work, do you? If you do, could you upload it here?

[QUOTE=Chops]
6) Have you tried having another officer in the raid run GRSS at the same time and compare to see if they have all the snap shots or are missing the same data as you.

Another odd ball is whether or not this happens when you are dead and/or how far are you from the boss when it dies. I have seen instances in the past where someone running GRSS was not close enough when the boss died to get the even trigger that indicated death. This usually happend in long multi stage fights where you might be fighting a minor boss before killing the primary boss and thus you are dead clear across some room or cavern and not near the boss when it dies.