Last night I had a quite profitable short going when I decided to close my position. So then I hit "close" and nothing seemed to happen, so then I hit "close" again, then a while later I see myself as having a long, so I hit "close" again, then I had a short again and so on (I can't remember the details now).
I heard this too many times and I don't believe it's coincedence. BFX is well aware of this issue for more than a year (maybe even longer) and it's still happening on a regular basis. This is trivial fix in their code. I wonder why they don't fix this
Sorry for your loss.