I ran into this the other day.

Being missing from AO for a long time, returning to try out these missions is nice. However during an earlier mission I collected two "recruit dogtags" from OT mobs. When I undertook the Ring quest (first ring) i was allowed to put the two "recruit dogtags" into the"grunt bag" and then give the bag to Commander Brock. Net result? I lost two recruit dog tags *and* the bag and had to delete the mission.