Messages Doesn't recognize my own Contact Card
I'm having the same issue when trying to send a message to myself from the computer to the phone. Even though there are active message strings to myself within the app to a couple different accounts, if I try to compose a new message, it won't show either of the active conversations, or any of my active accounts in auto fill. Even if I type my phone number in the exact format, it won't come up. I've checked the preference within messages, and it all looks fine.
MacBook Air (13-inch Mid 2013), OS X El Capitan (10.11.1)