Here is my problem. I completed the game on 360 first and then played it on W8 and again got all achievments.
Back to 360, when I push the Xbox Guide button and go left to select achievements, the list only shows that I have 24 of 25 unlocked with 240 GS. But when I go to the game and select Spartan Assault it to see each individual achievement, it shows 25 of 25 which is correct. I've already tried recovering profile, waiting a few days, re-installing game, nothing works.
Halo waypoint shows the correct number. Smartglass shows 24 but right underneath lists 25.
If anyone can help, this is really annoying to me I look at the list constantly and it aggravates me to see incorrect info that I can't correct. Thanks.