Email delete problem

HI,
thank you for allowing me to join.
I have a problem with emails going to the delete box when I haven't clicked the delete box.
I put a tick in the box next to the email I wish to delete, I then click delete button and it randomly deletes the email below(sometimes 2nd one below) the one I have selected as well.
It is very frustrating as I have to check what email is below the one I'm deleting before I delete and then check in the deleted items to recover it.
I have tried to contact yahoo but they don't exist as humans sadly.

I would really appreciate any help.
Kind Regards

Tony
 
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