I went to play offline today and I noticed all my weapons were missing except for a few pistols and the scar and none of them were upgraded even though I had upgraded almost every weapon before. I dismissed as a cloud save issue so I waited until my internet came back up. When it did I went to play again as usual but all my weapons except for the 3 pistols and scar were gone. I checked my deniable ops stuff and several outfits were missing and none of them were upgraded. Finally, I checked the PEC challenges and none of them were completed either. The only thing that remained was the four weapons, my story progress, and my DLC.
My question is, why the hell did I loose all of my crap for playing offline and can it be fixed?