when I move mail from the new mail folder to the folder files the email says it has moved..

but the mail still stays in the new mail folder and will not leave the new mail floder? If I close aol app and turn off phone then turn phone on the mail will disappear??
I can delete it but not move mail from new mail.

I'm using a Samsung phone android operating system..

this has been going on for 2+ weeks very frustrating?
I have been with AOL since 1995 the dial up days.. please help..