Hi,
I have two iPhones and have reset the iMessages several times and have never seen anything that suggests an SMS is sent anywhere.
I am not even sure that Apple have separate login points spread around the world.
Having said that they may operate a sort of Virtual Private Network where you do access the local point to you, but the service works as a centralised server.
I had an issue once where the iPhone number was shown along with the Apple ID but the iPhone number was Unticked for some reason.
I removed the Apple ID and then set the iPhone to Airplane mode to break with the Server.
I then restarted the iPhone and then the Messages app and checked the iPhone number was now ticked.
Once I saw this was done I re-added the Apple ID.
My Mac then got the pop up alerts to say the iPhone was using the Number and the Apple ID.
The Number does not disappear on my iPhone.
Do you have another iOS device that showed the iPhone number that you have then tried to delete it from that iOS device ?
This normally gets a warning messages that the "Alias" concerned cannot be used with iMessages again.
I am wondering if you have effectively blocked this iPhone Number this way.
8:15 pm Wednesday; October 2, 2013
iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.4)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images." No, Seriously