The past week Ive noticed some kind of weird smudge on my ipad screen. It was under the glass, and appeared to be an LCD defect so I took into the apple store and got a replacement. Before I did this I backed it up of course. After getting back from the apple store I restored my ipad from yesterdays backup only to find that some apps that ipaid for are missing. Any idea whats going and how I can get these apps back without paying for them?