Savegame silently failing?

[zgrssd]

I have a case, where I am not sure if I got a bug or just a miss-remembering. But I think the later:
- i saved this game just before turn 14 End turn. I save it into a dedicated savegame, as I usually do.
- today I loaded it up - and I was back on Turn 5.
- unfortuantely, it seems loading savegame already sets the "last changed" date, so I have no idea if I may just have saved to the wrong file/made some other mistake. Or if it silently failed and kept my Turn 5 savegame. Or failed even worse and replaced it with the T5 Autosave.
- my only indicator is the savegame file (as that one keeps going up each turn).
Manual is: 1927114 Byte
Turn 5 Autosave is: 1928080 Byte.
Turn 6 Autosave is: 1941059 bytes

Please make sure the saving can not silently fail.
Also please do not change the "last changed" date on loading - writing should be the only thing that updates it.