Maryville played Powell the week before your loss, again, to the Rebels. Since Maryville has played Powell and Wm Blount every year for the past 10+ I would say this year was the exception. Powell has been way better than the Govs every one of those years until '07.
As for the win over the Govs taking its toll on Maryville, I believe the Heritage game was actually the one that produced the injuries that Maryville is now healing from.