When I try and sync music to my iPhone 4 GSM iOS 5, iTunes will randomly "cancel syncing" and stop syncing the music. On my iPhone, some songs will be on the device, and able to play, but other songs will be greyed out, and I cannot even select them to play. Also, playlists are not sorted correctly. example: in iTunes: recently added: sorted: ascending in iPhone: recently added: sorted: descending (wtf?) any help would be great. Thanks.