I think this is a problem between Itch and Paypal, unfortunately. I can't find a way for us to control Paypal payments for our account. But I did send a customer support message and we'll see what they say!
Ah well, sometimes the tech just doesn't want to work the way it is supposed to. Thank you for the fast answer, though! I will keep an eye out, hopefully everything will be resolved sooner than later :)