I have mentioned this before but still happening. It was apparently something to do with a beta test.
From the email links I get to two different login requests. They look similar but one accepts my saved login details whilst the other doesn't. So then I have to enter my details in full.
To make matters slightly worse, when signed in using one of these and then clicked on another email, I was asked to log in again.
I realise that this is not a key problem but surely an easy fix