Help with ENS Metamask connection

Hi there, I'm stumped on an issue and could use some help in case anyone knows how to troubleshoot:

1. I'm trying to buy a .eth domain on the ENS app.
2. I have enough ETH in my Metamask wallet to cover the txn + gas.
3. The Metamask wallet address that is connecting to ENS is an address I've never seen before with 0 ETH, which I can see on the Etherscan page.

Does anyone know what I'm doing wrong here? It looks like Metamask is linking some other wallet with ENS. I only have 1 account on Metamask, which is funded with enough ETH to buy the domain.

Thank you for any help..