The trophy was bugged because there was two reset on the server for the weekly stats. Once on Saturday night, and once on Sunday afternoon. The first reset didn't give out trophies, but the second did. However, the second reset only counted the games played on Sunday.
This is why everyone is getting this trophy when they weren't supposed to. It just depends if you played for a few hours on Sunday or not. Everything before that was essential wiped.
That's interesting. I played a lot yesterday, I think was ranked 608 for the day. I'll have to see if I got the trophy. When did they hand them out? this morning?