Nokia Lumia :: Sending Messages With It?

One thing I have noticed if you have friends with several phones with them. Let's say Bob has phone A he carries all the time, phone B for work and phone C for boasting. He sends a SMS to you from phone C (the phone he always forgets to his car or somewhere else).The message comes to your Lumia phone to the same conversation-line as all the other previous messages from him. You can't actually see from witch phone it came. You answer to it and he never responds, because you mistakenly sent it to the phone in a glove compartment.