You have no idea how much I like answering Mac/Apple Tech questions.
Okay, first, go to your iPod in iTunes. Select "Manually Manage Music and Videos".
If there's any other Automatic sync settings, you need to turn them off.
I know manually adding songs is tedious and annoying, but it's the ONLY way to work around this.
If this doesn't work, ask the users here. (You may have to create an account to post, unless you find a similar topic there.)