On my Xbox 360 there’s more than one profile available. I downloaded the Claptastic Voyage pieces on the profile with the season pass and did it in the order of compatibility pack, part 1, and part 2 from downloadable content on main menu. After downloading all of that I was getting the error that I needed the newest game update to play. In the store compatibility pack and part 1 show as installed but part 2 shows as not downloaded. After redownloading part 2 several times I double checked and it shows up in my system storage as being downloaded even though it will not register in the store that way.
I turned off my internet, logged into a different user from my season pass holder, and was able to access the content just fine. I logged off, back into the season pass holder and even though part 2 still shows as not downloaded, Claptastic Voyage is now able to play. I don’t know what changed in the fun go around to make it work, I maybe didn’t even need to login as another user, but the dlc now works and that is all that matters. I don’t have enough internet per month to download all three parts 4 or 5 times each. I am a high usage user and they capped me at 300 GB, with gaming, streaming and games with gold downloads, really more than one time tips the balance over the fine line I have to walk.