That actually is a very big deal. I've written entire posts about losing posts that qualify as absolute rants on top of that. I really hate losing posts. And if that persists I would definitely file a request with Support over it. It sounds like you might (or might not, I really don't know) have the bug I've encountered where logging in and out of different accounts without clearing cookies can kind of switch drafts between account names (I wrote a whole thing up here about it - FYI: Lastpass was not the problem as I had at first thought), and I'm still not over it, because the same exact thing happened to me on LJ, and I just got to a point where I lost so many good posts over the years between that and getting knocked offline after starting a post and not realizing I was offline throughout writing it until just before I was ready to get back online and finish it that after some time I couldn't recover from all my lost posts anymore - I mean, I lost some really good stuff, and not just for this journal but for Anti-AOL back when I was updating that, too - and yeah, sometimes it's just maddening).