Halo 1,2 and 3 are not showing complete

I put lots and lots of time into completing this games on legendary to get the legend achievement but after I completed them I checked the achievement rendering only 47 percent complete even though I beat all the games on legendary. 343 please fix this because I wasted 10 hours on this achievement only to see it’s not even half way done. Thank you

I am pretty sure that this will not just get fixed and you will need to re-play the levels again.

Maybe wait for the new update to come out before trying again though?