Specific songs blocked from offline sync?

[res0nat0r]

I've enabled a playlist with some local tunes from my library in Windows. All songs are now 'not greyed out' , and also will play on my windows box when I click 'Offline Mode'. But the tune I concerned about still won't get pushed to my Android.

Are there specific artists who block offline / mobile play? I can't seem to get a song here or there to sync, and syncing seems to work perfectly fine except for a couple of tunes so I am wondering if artists specifically have this disabled and this is the problem?

[res0nat0r]

Actually this looks like local tunes aren't syncing because for some reason my Android isn't showing up in my Devices list. Does anyone know how to fix this? I deleted and reinstalled the app on my phone.

Syncing is working as when I make a change on my Mac / Windows box I see the change immedialty propagate to my phone, but I can't get local tunes to sync, nor my phone to ever appear in the devices list.

Any suggestions?