Why aren't all my contacts syncing to google from my android?

[AC Question]

I'm trying to back up and sync all the contacts currently on my android phone. However, every time I check "sync now" only a select few of my contacts are transferred and saved to my google account. There are a handful of contacts missing from my contact list on my phone.
I have tried unchecking and checking the sync box and have cleared cache and data for Contacts and Google and yet nothing changes nor helps.

So why aren't ALL my contacts saving to google and only just a few?