I've been experiencing this weird thing in my iPad. I'm sure I don't have that many apps, I only have around 1GB of apps. But when I see it in my iTunes, it's showing that I have almost 4GB of apps. When I try to remove the apps, to see if I really have that many apps, the iTunes bar chart changes and showed that I only have 1GB of apps. But when I click sync, it goes up to 4GB apps again, does anyone know what's happening?