Second Text Window when receiving text

When I get a text from one specific number I always get notified with a blank text message field as if I'm going to send a new message to this number.

The second message comes with the *67 at the beginning then it's the same number as the actual senders number. I use to have this in my contacts as an alternate when I wanted to dial this number hiding my caller ID.... but that listing is gone now.

I still get the text to the normal number and contact name, but don't know why I always get this alternative text alert.

Idea's?????

So you know... I've:
1. Made sure that number is not in my contacts list.
2. Edited and resaved the contact in case it was corrupted.
3. Restarted my iphone.
4. I'm on an iPhone 5, and they are on a iPhone 4. Both of us are running the latest iOS.

Thanks!