Secondary Objectives and Data Sync

I hope you can help me I have two problems.

  • Well the first one is I’m having problems with the Data synchronize and I lost all the save games. - The second is with a secondary object, in the 8 mission, “Hold the Line”. The secondary objective of keeping intact the barricades I always fail it. I have passed without the barricades being destroyed but it always fail.I hope you can help me.