Welcome to Android Central! You probably shouldn't have moved the Facebook pictures, because the system still wants to use the prior save location, and I don't believe you can adjust where they get synced to by default. You should only move photos and other files that you yourself copied to the phone.
Are you able to move all of the folders from the SD back to where they came from? If not, first see what happens if you log out of your Facebook account on the app (hit menu, then Log Out), then log back in. If that doesn't work, then go to System Settings/Accounts-Facebook, and then tap menu and Remove Account. Once that's done, open Facebook again, and go through the initial process of adding your FB account back to the app. Hopefully, this will restart the process of syncing all of your photos and timeline information to the app.