im not too familar with itunes, so i dont know if i did anything wrong. i wanted to upgrade my firmware (iphone 3g, currently on 2.2 firmware, jailbroken), so first i did was to back up my iphone. and fyi, i have just bought a new computer (windows), no previous backups or songs or anything on this comp, it's a clean slate, and i have just downloaded itunes, authorized it to recognize this comp and everything. when i synced it, itunes kept asking me if i want to replace my iphone with data from the itunes, which was empty of course. is that normal? so anyway, i went ahead and synced it, hoping the datas from my iphone would sync TO itunes instead, not the other way round. looks like it did as i hoped. the problem is, i noticed at least 1 app went missing, which happens to be an app that i paid for. it's not on my newly itunes backup, and it has also been wiped out from my iphone. curiously, all my other recently installed apps are okay. i dont know if i should reinstall that app and pay for it one more time, then maybe claim back with apple (asumming i can still find my receipt), or how should i go around it. but in any case, how do you actually back up your stuff properly using itunes without having such problem?