Hey, i have reported this problem in a couple of posts already, but wanted to make a New thread since i think i might have found a problem/solution.
Last nite, my game suddenly did a "rollback" after i restarted KSP, it removed/deleted the manual saves called "quicksave #1-10 and even rolled back the persistent file too an earlier hour.
Now, i had an idea that it could be something too do With max save files, since my started "bugging" up at save "quicksave 11". At this point it seemed that the persistent file (Autosave) did sometimes save, but the "Quicksave 11" was always gone when i reloaded the game.
-------------------------------------------------------------
Well i've now tested more, soo see my post below
-DaCana