They discuss Von at the start of the show. If he gets suspended, which seems to be a likely outcome, then it becomes manageable. They save a couple of million on the year, but there will be options to claw back cap dollars later on (in short, likely a lengthy process a year or two down the line). If no suspension then the Bills will be significantly worse off if they get rid of him. So until things get clearer they were not going to factor in the what-ifs of the situation.
The cap increase is already figured in to their figures.