Achievement bug?

So i completed Halo Reach on heroic during which i got the ‘Lucky me’ achievement (and a few others) both of which are not showing up on this site but are listed in my 360 Dashboard achievements, where as the other achievements i got while on Heroic are still there

I thought that they might just need to load in, but if the other achievements i got on the same run show up why not these ones?

Hey OP, I just checked your profile and the “Lucky Me” achievement is showing up for me as being unlocked. May just have taken a little bit for that one to sync up :slight_smile: