Info-Mac

I bought some songs off of iTunes through my iPhone 3G, synced it with my computer, now I have the songs on my computer and not on my iPhone. does syncing take the songs off my phone? I though it was just copying them? Advice?

Depending on what playlists you have set to sync with your iPhone, yes I imagine it could. Not 100% sure on that though, never noticed such a problem myself.

"sync" does not mean "move and delete," so no, syncing does not necessarily take songs off your phone. What you want to do is check in iTunes regarding what you have set to sync TO the iPhone. iTunes (on your computer) controls what songs are put on your iPhone, but you have to tell it what (playlists, artists, albums, songs etc) you want on there, since space is limited compared to your computer.

Have you checked that mange syncs options are on? then just drag it to your iPod logo