I am out. I have never had this much trouble on a yahoo email account.

I am moving my email to another service. It isn't great but it's much better than this new email from yahoo.
I would have gladly stayed had I been able to have gone back to basic or classic but that option is
not available on my account. This is useless as an email service.

It deletes my read emails. NO it doesn't move them to another folder
I CHECKED EVERY FOLDER I HAVE, THEY JUST GET BLOWN AWAY AND A SEARCH VERIFIES THEY ARE
GONE.

The only thing you can do is mark them as unread and leave them that way.