Lost progress - bug with cloud saves?

I had played through to where the fighting starts in act 2, saw the save icon flash up and turned the game off and went to bed. When I tried to go back and continue my game it put me right back at the beginning of Act 1 chapter 4. Act 2 is locked in the menus even though I can see i have collected stuff there.

I’m guessing its a bug with the cloud saving. What a heap of crap. I’m finding it hard to go find the will to re-do it as i don’t trust it not to lose my progress again.