Problems with save files.

No guys, I think this topic should be the main one right now! After all, all our tactics, schemes, and walkthroughs are falling apart because of this problem! Yesterday, I spent until 3 a.m. completing the first map for "Sanctuary" on the highest difficulty! Moreover, I had already completed half of the second map – I loaded it up today! And it started from the beginning of the first level!!!
And it's not just our problem!
Why is everyone silent? Are you all playing pirated versions?