Currently Being ModeratedMay 16, 2013 6:15 AM (in response to davidgueringer)
Howdy there David,
I was thinking about the issue you are describe and found an article that help what is going on here. It is named Managing content manually on iPhone, iPad, and iPod found here http://support.apple.com/kb/HT1535.
By default, iTunes automatically syncs your entire iTunes library whenever you connect your device to your computer. On each subsequent sync, iTunes will automatically add any new music or videos to the device and remove any items that are no longer in your iTunes Library.
You can also manually manage music and videos on your device. Manually managing your device allows you to choose just the songs and videos that you want to have with you.