Where are my savefiles?

So, I wanted to look at some terminal clips just for the hell of it, but I found out allthough I unlocked all the terminals and watched them before, they are all locked again. Seriously wtf?!

So, after cooling down I thought what the heck, I’ll just run trough the campaign on easy and unlock them again. But when I wanted to start Requiem it said that mission Dawn up until Infinity are all locked again, allthough I justfinished the campaign on Legendary (Seriously?! Do I really have to complete Infinity on Legendary again???!!!)

I finished the campaign on Heroic the 8th of november and now it says I havent played these levels at all?

Also after finishing the game on Legendary a couple days ago it didnt unlock the legendary achievement, it did unlock the Mark V armor though.

Is this game one big glitch or what is up? Will I all of my info restored eventually?

I am pretty upset about all this anyway.

If you look at my stats you can see I finished all the levels on legendary aswell, but the game itself thinks otherwise somehow.

Nobody else had this?

Really? No one else? Or Does someone have a fix for this?