Help!!! DLC wiped!

I went to my cousins recently. I have an xbox elite and he has a slim. I transferred my stuff and before i left i transferred it back. Now that im home i tried playing halo 4 and all my stuff is gone from dlc. the specialization priority (both, one being from limited edition + all the stuff with it, deadeye helmet, raptor skin, forest skin, arctic br, everything! What should i do.

Go to XBox Home
Go to settings
account management
recent downloads
redownload the content

Thankyou so much ill try… you are a life saver