Yeah, there is something going wrong in the merge process, and it's been cropping up here and there for random profiles for the past couple weeks - someone's looking into it.
The problem itself doesn't seem to be causing any incredible harm to the users it affects, and you should be able to use the site normally. It is transferring all the posts and comments just fine, but it's not deleting the old profile it moved content from, and it's not running a reputation recalc on the destination profile to readjust you to your actual reputation.
But of those problems are easily solvable if you just make us aware, and you can even fix the reputation problem yourself. Just go to any of your posts, delete it, and undelete it again. This will schedule you for a reputation recalc, and it will occur within 30 minutes (whenever the system runs the cycle to process recalcs again).