Wtf, Monero GUI sent to a different address?

Monero GUI, I put in a wallet address, check the transaction summary, address looks good so I click send. No money arrives so I check transaction history in the GUI – it sent it to a completely different unknown address?

Not a huge amount so that’s not the main concern, more like wtf happened? It’s an official download, and I’ve sent and received with no issue before. It’s a MacBook aswell, do I really have malware? Haven’t downloaded any suspicious files, and in any case I’ve got pretty strong permission limiting so this is strange.. I’m especially confused because it didn’t edit my clipboard like I would’ve expected it to, the address was correct in the summary.

What do I do now, just wipe the laptop? Is there any other reason this could’ve happened? Thanks.