syncing music to an iphone

Hey rkkbear,

Thanks for using Apple Support Communities. I see that you want to know how to sync the songs that were dropped off during the syncing process and I’d like to help. First, I'd suggest using the following resource to verify the steps you're taking to sync and try syncing the missing content again: Sync iTunes content on PC with your devices

If you continue to have trouble, so we can further isolate the issue, could you tell me if all these songs were purchased through the iTunes Store? If not, were they downloaded from a third party source or burned through a CD? Do you still have access to these music files? 

I’ll be looking forward to your answer. Cheers!