happened to us also
same thing for us...i got card (ordered 3/22, recd. 3/29) but spouse did not get it yet, not ordered yet (vm still says case approved) so we are still waiting.....although we stamped at same time (1/30). i have seen a few other cases as well....cowboy got his 16 days after his wife recd card, elang got it 2-3 days later....strange!!! the wait never ends, i guess...