I've recently created an account at Area 51, to follow and commit to a proposal. In the list of commited users my "total rep" is showing only the Area 51 reputation, but not the Stack Overflow one (the only one I have >200). The commitment score for that proposal is also showing
18/100 committers with 200+ rep on any other site, confirming I'm not included in the count.
Why is that happening? I looked at other questions and saw that most commonly it's either because of low rep (<200) or because of a delay in the database sync (I waited 3 days before asking here). Neither applies to my case. My accounts seem to be properly linked, at least my discussion user shows all of them.
Update: as a related question shows, that's probably a bug. Also, I'd like to point out that having <200 rep in Area 51 is not a problem, since many users (like this and this) are in the same situation, but their flair looks fine (as can be seen here).