Mine haven't updated for weeks either.
TH3R1S1NG's forum posts
Recently it's been basically impossible to get into matches on Brotherhood because almost no one is playing it anymore it seems, if anyone would like to play with me to finish out the multiplayer achievements it would be awesome. We would need a total of six people. Post in this forum thread or PM me to set up a game.
P.S. The achievements I need are: "Strong Closer", "Download Complete", "Role Model", "Abstergo Employee Of The Month" and "Ahead Of The Curve"