email won't delete

I have a gmail account and today a few emails kept synchronizing over and over… I finally closed eM, deleted the emails from within GMAIL and then reopened eM. Now one of those emails is sitting in my inbox, the sender doesn’t show but the subject does, and it should not be there at all since it was deleted! Any thoughts? I also emptied the trash folder and then closed & reopened eM, but it is still there.