In common with monokakata, I do not have those two displays on my iMac either. I am running Sierra 10.12.3. I find when I call up a draft email using my IMAP gmail account to continue working on it, it refreshes itself every 5 seconds or so. Eventually I finish the email and send it, and it sends cleanly and the drafts count shows empty, which is as it should be. I also have an iPad 2 and an iPhone, both running IOS 10.2.1. When I get a reply to my email, I am finding a great number of draft emails displayed on my iPad 2 ranging from the full draft right back to its opening line. The worst so far is 360 of them! This happens on my iPad only - not on my iMac and not on my iPhone. I have checked the gmail advanced settings on my iPhone and my iPad and the settings appear to be identical. I have also checked my iMac. All three show drafts being stored on the Server. Could a kind person please help this very elderly novice to stop this happening and also to get rid of all the intermediate drafts wherever they are hiding?
I am grateful for any assistance please.