Help! I have an iPad2 that I sync with iTunes (Win). Recently, I have "lost" several apps, or rather, they seem to have become invisble. When I go to the app store, it tells me, they are installed. When I got to the Apps section in iTunes, I can check/uncheck or drag them to a screen preview and when I hit Apply, iTunes say it installs/removes the respective applications. But but they never becomes visible on the iPad (although are shown in the screen preview in iTunes) What am I doing wrong?