Yeah, I thought the Welker fumble was a call that the zebras should make correctly the FIRST time, and not need it to be challenged.
As for the quick whistle on JP's sack, I think they did the right thing since he was in the grasp, had his forward momentum stopped, and was vulnerable with another Dolphin bearing-down. And even if they didn't whistle it, the ball would have been picked-up by one of the Bills most likely. At best it likely cost the Dols about 4 yards in field position and at best it saved JP from extreme harm.
As for the Culpepper fumble, I didn't see it so I can't comment on it.
And I saw some bad calls that went against the Bills. But this was NOTHING like last weekend.