when you purchase itunes on your phone, how do you keep from losing them when you sync? I think I lost my tunes that I bought when I synced to itunes and added my library from my mac. That really sucks!
The purchased songs should transfer onto your computer during the syncing process.
Are you saying yours did not?
Any purchased music from the WiFi iTunes Store should be synced to the "Purchased on (iPod/iPhone name)" playlist on your computer (which is automatically created).