No bug here.
The Area 51 "user card" showing the user name, reputation points, and badges, is doing a sum of all the user's accounts having 200+ rep plus the Area 51 account itself.
In your case you have only Stack Overflow and Area 51:
2052 + 161 = 2213 so next question is: why is the card showing only 2203? Where are the missing 10 points? And the answer for this is caching: while the accounts list is real-time (maybe with few minutes cache), the card is cached for about a full day i.e. recalculating the reputation and badges only on daily basis. Since you got upvote on Stack Overflow today, it's not yet reflected in the card.
This assumption can be verified by another example, the user who started this proposal - very similar to your case.