MCC question

I completed Halo 4 on legendary on xbox 360

but as MCC is downloading and says “ready to start”
Halo 4 is at 100% but it says I havent done it on legendary, please dont tell me I have to do it -Yoinking!- again?

Sorry you have to do it. Halo 4 and MCC don’t share campaign progress. It is also one of the easiest halos on legendary.