mouse unresponsive if tab out + career bug

if you get an achievement or use the steam overlay in game the game will bug and start to act as if you are tabbed mid game, your spartan will be unresponsive and you have to click to fix it.
second bug has been around for so long, campaign progress on career doesnt update properly, i have completed halo 3 but it says unplayed and i just finished reach legendary and it says my highest is normal