It's because you're at 200!!!
It's the curse of One-derland! They have a very strict hazing process and all who enter must first stall in the low 200's before crossing the border!!
It's true!
Seriously though, we've been discussing this on the 100 lbs board. So many of us stall at 200!! Furthermore, we seem to stall before all major milestones. Once you get over that hump, you will the scale move a bit quicker. I don't know if it's the stress of desperation or what, but it's definitely annoying!