We'll I have an iPad and I recently downloaded an app called Star Wars commander and when I tried to buy something it says that I need to download this app using the Apple ID I using to buy it. I used my Apple ID to download it and my other to try and buy the in app purchase. Also if I delete the app will it get rid of my data. I have connected it to Facebook and gamecenter but I want to make sure.

My experience with Apple IDs and talking to Apple about using different ones to download apps is this: the app or purchase (like an update or add on) goes with the ID you used, and there is no transferring one to the other. Sorry for the bad news. It certainly taught me to use just one Apple ID as I lost data and apps, too.