Completed games not showing up on dashboard?

Ok so here is my dilemma. I have 1000/1000 points on Dead Space, Lost Odyssey and CSI. I have 1050/1050 on Mass Effect, and have 1000/1250 on Oblivion. So, only LO, DS and CSI are showing up on my dashboard as completed games, even though (back when Bring Down the Sky was the only ME DLC) Mass Effect has all the normal game achievements PLUS the DLC achievements. Then, Oblivion, I have all the achievements bu tI haven't played TSI DLC.   
 
So why is: 
1. LO is showing up as complete even though I don't have the DLC 
2. Oblivion isn't showing up but I DON'T have the DLC 
3. and Mass Effect not showing up even though I have the DLC achievements PLUS regular achievements (even when it was just BDTS as DLC) 

1. Lost Odyssey probably needs you to download the DLC to recognize the extra points
2. Oblivion probably had an update installed that recognizes the DLC
3. Mass Effect has Pinnacle Station
 
It's a bit confusing, I know. I have Mass Effect complete despite not having either BDtS or Pinnacle Station.

But the thing is Mass Effect didn't show up even when Pinacle Station wasn't available. I've had 1050/1050 for like, months and months. 
 
Really, really stupid, if you ask me.