2 accounts 1 email and transferring data

Hey guys, merry Christmas!

I recently got a new phone and I wanted to transfer my FEH account to it. I messed up a bit so here’s what happened:
I downloaded and launched the app on my new phone and created a new account.
I thought that I would have to finish the tutorial to transfer my old data, so I did. But when I went to transfer my data, I accidentally used my email to register the new account.
This email also has my old account registered to it so it has (or had?) 2 accounts registered to it? Idk what happened. So I panicked and deleted all the game data and reinstalled the game.
So when I’m trying to register my old account through the main menu, I tap on my email, it takes me through the tutorial and all the steps to start a new account. Idk if this is what’s supposed to happen when transferring old data and I’m scared that I can no longer transfer my old account to my new phone. Please help :’0 I’m trying to transfer from Android to iOS btw.