I can tell you that I have 101 rep points.
this only started happening as I went past 100 rep points.
I can also say with a fair amount of certainty that I'm the only one to have passed 100, since if you look at the member list sorted by reputation I come at the top.
there are two ways that we can determin if this is true...
either a few people could give David positive rep to bring his total to over 100 and see if he gets a second rep bar too, (I say daivid because he is the next one behind me).
or a few people could give me negative rep to see if the bar drops back to a single bar if I go below 100 rep points.
this is the only explenation that I can think of so far, unless it's a probem that specifically affect my account. (which I kind of doubt).
Hoping David can throw some light onto the situation?