Solid Gold achievement not tracking progress

So I've been working on grabbing some achievements and I went through and gold gold on every challenge. This gives me 270/290 on the challenges tier. Unfortunately, the Solid Gold achievement, recieved for getting all other achievements in that tier, doesn't seem to have been tracking my progress since I got my second gold. Returning to a challenge and getting gold again doesn't update it. The only other instance of this problem I could find was when someone gets some achievements on one computer and some on another, but I've gotten them all on this computer and I've been connected all the time. Does anyone have a fix/workaround?

 

Is not the solid gold achievement awarded for getting gold in all the single-player challenge modes? That's how I got the achievement titled "solid gold".

Also note, that I didn't see anything from the achievement until the I got gold in every single challenge mode.

 

Yes, it is recieved for completing every single player challenge. I have gold on each one, and I have the achievement for each gold challenge individually.