Another bug...
You'll have to excuse me, I'm a software tester when someone wants to employ me so I have a fixation on bug finding. This is a weird one, the attached picture describes it well (It's very compressed so it ain't pretty). Upon a game being won, the players list is reordered and the replay is shown. However, the names in the replay show the belt information for the next fight.
In the example below, I had just beaten 'Tori' as 'Uke'. The replay show it was Me vs RORROX which is accurate. RORROX is a green belt as per the HUD colour coding, but the replay information displays RORROX as being a brown belt...this information is the new Tori (me), not the Tori during the match itself.
Naturally this occurs to Uke's position as well. I am shown as being a blue belt which is in fact the belt of the next player in Uke's shoes.
Hopefully this should be of some use to you.