ruling needed for controversial bankroll situation

Leave it to f'n berg to bring in the controversy on the first poker challenge. The deal is, when the challenge started, berg only stated the amount in his pp roll because he didn't plan on playing any ub for this challenge. On the first night of the challenge, berg saw gd playing a lil 5-10 ubet, he wanted to jump in and give it a run. Only having 92 bones in the ubet roll, berg had to play a lil 1-2 to bring his roll up to the 100 bone min. required to sit at 5-10.
Berg made the money to sit 5-10 and then jumped in the game with gd. Once the round was done, berg found himself down to $40 in the ub roll and headed out of the 5-10 for some plo. Playing plo the next day, the roll went back up to over 100 and berg jumped back into 5-10 with gd. Berg was feel'n the game a lil more the second night and brought the roll close to $200.

Question is, can berg use his ub roll as part of the challenge? Should the ub money be excluded from the challenge? Should berg be disqualified from the challenge all together? Should berg be kicked off the board and be ineligible to participate in any future challenges?

You make the call.