My boyfriend was stored in snapchat under his contact name in my phone for almost a year.
Yesterday, it suddenly changed to a contact name I had him stored under in my old phone before we were dating. I do not even have that phone anymore and the name that pops up is not even in my phone under contacts anymore and that number is no longer his number.

How does this happen? I know I can rename it and give him a new snapchat name etc but I would like to know if anyone can figure out why he would suddenly have a contact name from a non existent phone with a number he no longer has.