i know him in real life, so my guess is he's not a multi.
For the rating, im not sure what happened in the game. Maybe you pissed him off by during 1 turn or something like that? (its his issue, so i wont know the reasons)
So how did you meet MrStealth?...... If it was in that game you all never even said Hi........ Your friends?.... from where? In fact game 3 there was a "LOL"... and game 5 I think there was a "bump"............... You "friends" speak? Not in chat......... mmmmm...... Heck I even chat with Bogan & I ...