Multiple Copies Of Draft Emails In Windows 7 Live Mail?

I hate to start with an apology, but I can't believe I'm the first to raise this point, so I'm sorry if it's already been done to death. But I've tried searching the forum, and couldn't find a relevant thread.My issue is this. When I'm writing a new email in Windows Live Mail, like most careful users I like to save the text every now and then. It's an instinct borne of hard experience of losing data, which can happen any time with any software. I just automatically click Cltr-S periodically without even thinking about it.Unfortunately, it appears to me that every time I do this in Windows Live Mail, the program creates a new copy of my current draft email in the relevant Drafts folder. If it's a long email, or one I'm phrasing with extra care, I can end up with maybe ten or fifteen nearly identical drafts cluttering up the folder!This behaviour seemed so bizarre when I noticed it that I trawled through the settings, looking for a way to override it, but I can't find any reference. Am I missing something obvious? I must be.

In Outlook Express (sorry to dredge up that familiar phrase), when you do what I've described above, the software behaves logically, and simply resaves the amended draft email each time over the previous version, so that you never have more than one draft copy at any time - which is how nearly all word processors also work. Surely that's how Windows Live Mail should behave too? I realise there might be occasional instances where you would want two different versions of a draft, but surely these instances are far outnumbered by the times when you just want to save a single copy incrementally as you write it?