App Not Backing Up To iTunes

[OMMBoy]

Hi, Everyone!

Back in July, I downloaded Starbucks' pick of the week, SoundHound ∞. This evening, as I was backing up my iPad to iTunes, I noticed that SoundHound ∞ was not being transferred as it wasn't showing up in my list of apps. Also, when checking the App Store, it lists a price where it would normally show "Install" if it were already purchased. Does anybody have any ideas what's going on? Am I missing something? Any help would be greatly appreciated!

Thanks!
Chris