Halo 2 achievements and completion

Hi, I was trying to obtain helioskrill. I completed all the campaigns including halo 2 on legendary. When on console, the game shows that I completed all the halo 2 missions solo on legendary, however I do not have the “avatar” pictures that you are suppose to get when completing certain levels. I also do t have the achievement for beating halo 2 on legendary or the one you need inorder to obtain helioskrill. Halo waypoint shows that I only have completed the first 3 missions. I tried replaying some of the levels that showed as incomplete on waypoint but it didn’t work. What should I do?

My brother also has this problem and still does not have helioskrill… He used scarab and bandanna skulls but I used them too and still got helioskrill on my account, so I don’t know if that would affect anything.

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> My brother also has this problem and still does not have helioskrill… He used scarab and bandanna skulls but I used them too and still got helioskrill on my account, so I don’t know if that would affect anything.

So do those skulls prevent progress?

No those skulls do not prevent progress to my knowledge because my friend has gotten the legendary anniversary achievement with them on