Thank you. I am quite sure I manually signed out as well as erased the previous device earlier this month, following clear directions on this website.
But as I tried to proceed with the activation of my new iPad, my password was rejected. I followed verifications via my activation lock, a text, then an email. ["Enter password you (had) use (d) for other iPad" which I did] None of these allowed me to proceed.
I use iPad for books, video, reference works, separate from my phone. I only have two active devices.
Now I'm locked out of this account and have to wait one or two days for someone to analyze the info.
Around February my iPad, same account, had lines all over the screen obscuring the menus but I managed to erase it and activate another one in April with no fanfare. I returned that one tho.