I guess I wouldn't call December of 2003 a swoon. The two losses were to the Super Bowl champion and the NFC runner-up, and the Dolphins won their last two games of the season (as well as 5 of their last 7 after starting 5-4).
You don't count the 2 losses b/c they were against good teams but you count the W's when they came against 2 6-10 teams and after you were already eliminated from playoff contention?