I... think the game is not saving correctly

[Zechnophobe]

So here's the thing, the first time this happened I did the following:

1) Save game via menu
2) Do a bunch of things, using quick save.
3) Next day, go back to use the original, non quick save...
4) Non quick save from 1) Didn't exist.

But maybe I just forgot to save and only thought I did 1? This is what I assumed at the time.

But I just reproduced the problem again. I saved via the menu, changed zones and did some quick saving, closed the program. When I restart, the save game is not there.

Checking the actual save directory, it looks like nothing is there. Is it possible that when I save from the menu, it is putting it in as a quick save, which then gets overwritten? Dunno.