LOL, your crazy. That would make sense MAYBE if he wasn't rocked and had one good leg to throw a 4 punch combo to end a fight while getting tagged. It's one thing if this was a freak event, but it seems like this is simply how combos work...
1) The speed of combos don't seem to change much at all when studded or even when stamina is low.
2) Combos shouldn't cancel out strikes, they should work when there is actually an opening.