My sprint account has 2 phones on it. My current S6 and my old S6 edge that is broken. The phone numbers for each are different. When i log into my sprint account, it shows that each phone has one phone number, they are differnt from each other, and they are the correct phone numbers. When my current phone sends a MMS message it sends the message twice, once from each phone number. This results in me recieving a text in a new thread including the second number. This also happens for the recipients of the message. I do not enter the second number when i send the message. My phone is auto adding it.