Snapchat is a crappy way to have any sort of an in-depth conversation.
You need something else.
Tell him you will Skype or you will email or you will talk on the phone. Provide your Skype ID, your email, etc., even if you already have several times. Just, cover this. Tell him that you won't be visiting him unless the two of you communicate in one of those three ways. Period.
I strongly suspect he is ditching you; he just wants a few last fucks before he does so, and also doesn't have the balls to just come out and tell you.
PS He probably added your new account automatically because his settings make that happen. He probably had very little intention behind that act.