I've noticed that not every time I use quicksave the game actually saves.. Don't know what's causing this. It's like this:

I complete some kind of action and then I quicksave. But when I want to load a save it only shows one instead of let's say, 5. So I can quicksave all I want to but in some kind of way the game chooses which one to actually save. Bizzar. Is there a fix to this problem? And it is a problem since Corsairs crashes at least once when i play it...

Well, I'm not sure how it is in Corsairs specifically, because I can't really play it because of unrelated problems.

Some games make different saves for each quicksave, but usually they keep only one and override it every time you make another one., so you only keep the latest.

Not sure if you just forgot about that or there is bigger problem.