Colony issue

I when to GameStop and got a pre-ordered code for halo wars 2 Ultimate Edition on the Xbox one. A few months later the game came out then the 1st DLC leader pack came out (Kinsano) and i had problems downlading the pack a few hours later it then allowed me to download it. Now I’m having trouble downloading the 2nd DLC (Colony). I think the problem is its getting confused with the PC version and all I want to do is play Halo wars 2 on the Xbox one not PC. When will this problem be fixed so it doesn’t hapen again.