I think it's clear Joey tried to block him...probably didn't intend for what happen to happen but it did. I'm surprised Matt even tried a pass that low...but anyhow, Joey let Matt back in...he could have ridden him all the way down, hugged the yellow line and sent Matt back to about 30th place.
But like you said, not sure what that had to do with Matt getting flipped over in a completely different incident. It's clear Matt, even though he got the best of Joey, hasn't let it go like he says he has....I hate his whinning.
Edit: I don't know...maybe I don't see the difference in the terminology but he was obviously pissed at the 22 and for really no reason considering what was happening all around those guys.