For teams it just groups them by the team name which comes from the xml generated by each project - teams don't have CPID's as such, though some other sites generated them as hashes of the team name - I don;t really see the point of that and just use the team name to group.
I only see one team named Brony@Home in the WCG team list - http://stats.free-dc.org/stats.php?p...wcg&team=29322 which is the other one you are referring to, so what is the name of your team at WCG ? mylittlepony ?
Unfortunately there isn't a great deal I can do given the data is coming from the WCG site itself. It would definitely be better if you can get in touch with this other team and try to sort it out, I could try and help with that.
This Sunmist2 doesn't seem to be crunching much at all, perhaps you could join that team at WCG and try to do a founder transfer ? Then you could rename the team.
It's certainly a sticky situation and I might consider posting it on one of the BOINC mailing lists and see what some of the developers have to say about it.
Bok