Good points.
Georgia is ranked #59 in RPI. I am very well aware of the imperfections in the RPI formula, and I suspect that Georgia is better than #59, but why on earth are they knocking on the door of the top ten? They shouldn't be knocking on the door of the Top 25.
Ironically, if they hadn't beaten Georgia tech, their "signature win" is a loss. Even considering the win over Georgia Tech, that may still be valid, in the sense that one's signature win is the best argument a team has for a rating. If they weren't originally ranked in the top 25, what game would have prompted any voter to conclude that this is a top 25 team?
Losing to # 25 is their BEST argument, which doesn't cut it.