IPhone :: Get Rid Of These Reappearing Invisible Email Drafts?

Basically, if I begin to type an e-mail message (doesn't matter what e-mail account I use) and stop typing it (where it makes a draft), if I cancel/delete that draft and never send the e-mail, the draft still exists on my phone somewhere I can't see. How do I know this? Because, just about every day, I'll get some notifications in the notification center re: those messages being unread/unsent. Clicking on those messages will pull me into the draft I was working on, but tapping "cancel" again (instead of send) on the draft will no longer prompt the dialog confirming I want to cancel and delete the draft. It just exits the message. Modifying the draft will cause the prompt to show up again, but clicking delete does not get rid of the draft on my phone. Sending the draft does not get rid of it either. It will reappear later. I have 3 e-mail accounts on my phone and it happens with ALL of them. One of them is POP and the other 2 are Exchange based. I reproduced it again yesterday with my Comcast POP account, this time actually saving the draft and deleting it for kicks.

1. Started typing an e-mail message.

2. Decided to cancel the e-mail message.

3. Prompt occured to delete or save the draft.

4. Selected delete.

5. Draft appears to be GONE.

6. Sometime later, in the notification center, my draft will show up there. I can tap the draft in the notification center to be taken back to it.

7. Tapping cancel at this point will just exit out of the draft. Sending the draft will send the e-mail message but it will appear in the notification center later. Typing more text on the draft, hitting cancel and delete will still cause the draft to show back up later in the notification center.

I've also tried a varation of saving the first draft, going into the drafts folder under Mail and deleting the draft there... but it comes back.ay try a erase all content and settings then reconfigure everything. is these drafts are searchable in the spotlight but you can't find them normally in the Mail app.

Edit: Forgot to add that I also deleted all the e-mail accounts and readded them too.

Info:
iPhone 4S, iOS 5.1