Native iOS mail app weirdness

Around a week ago I was browsing through my gmail account using the native iOS app and somehow managed to hit the "compose" button by accident, which of course started a draft email. I deleted the draft by double-tapping the "cancel" button and confirming the deletion, but noticed after returning to my inbox that I still apparently had a draft in progress. Repeating the above actions accomplished nothing, so I went into the "drafts" folder and manually deleted the email. At this point, even though the "drafts" folder was clearly empty, I was still being told that I had a draft in progress. When I opened up the supposed draft notification, I wound up with another copy of the blank email in my "drafts" folder. I've spent the past week trying every variation possible of the standard deletion commands, but none of them seem to be able to make this thing stay permanently gone. I tried getting rid of it via the native mail client on my Mac... no dice. I logged into Gmail.com and cleared out all drafts ... nope. Does anyone know what might be going on here and how I can squash this annoyance for good?