Itunes slit album on iphone?

I preordered MMLP2 and it split it into two albums and they both have different release dates. How can I put them back into one album using my iphone?

In iTunes, right click on each individual song, select "get info", go to the "info" tab, and make sure the box next to "part of a compilation" is checked. I don't know much about iphones, but it worked on my ipods.