I don't see an obvious way to reply to threads, so I'm forced to start a new thread.
I'm having a similar problem that others have reported. I've gotten three achievements for 60 points in the past couple of days, but they are not reflected in my gamerscore on xbox.com, even though I earned them while signed into XBL. Going under my games, the achievements are listed on xbox.com as being obtained and dated. Today for the first time, my information is "hung" on "Loading..." at the top right of the screen. Clearly, something is wrong with the site.