Is there a bug in the "total reputation" tab?
There is a "5k total rep" vs 56 shown for a username.
The "total reputation" number will only ever match the user's reputation to the right if they have not referred any users to the proposal. The number is actually a calculation of that user's reputation and all the reputation of every user they referred to the proposal.
Why does that extra number exist? I have no idea. But that's the way it's always worked.