My question is in regard to HAWX for the xbox 360.

I completed Mission 19, Monarch, on all three difficulties in co-op mode. I methodically went thru each of the 18 other misisons to complete each difficulty level.

However, the achievements for completing the campaign on each difficulty setting is not registered in my gamertag. I received 500 points for completing the mission on Normal difficulty yet 0 points for Hard and Expert.

Has anyone else experienced the same problem? If already covered, please help send a link. My search had poor results.