Hello I have an ipod touch and was wanting to sync all my music to a new computer. but when i go to sync its showing i only have 22 songs to sync. I have 130 songs. Y wont it sync them all? and once I sync all info does that mean it wipes it all out of the ipod touch. and I would then have to make sure I have a bakeup? Any help would be greatly appreciated. thank you for your time .