When you have the two personalities that are involved in Arum and Mayweather who already hate each other, there was absolutely no way this fight was going to go smoothly to a signed contract.

Oscar went through the same war with Arum when he broke free of him.

Bob Arum is not the nicest guy and Mayweather is a bit of a premadonna so theyre going to knock heads. Thats the reason Arum had to excuse himself from the negotiations, because theres too much emotion on his side, and you can see it how hes just blowing up in the media now after trying to keep quiet.
I still think Arum and company are in the drivers seat. Manny has many options. He doesnt need to make 25 million a fight. Floyd thinks he does and I dont think he can afford to take any other fight and risk a loss especially if he is in debt or in financial trouble. This fight just represnts too much to him.
Mayweather will concede and the fight will be made. I would be shocked if it wasnt. There is just too much money on the table for all parties involved.