Not sure... We occasionally do some "house cleaning" from time to time and merge up various (similar) threads, so I'm not sure if that's the case here, or not, though no one other than staff would have the ability to do so, of course. I could check, if you'd like to know.
Did you want them unmerged?
I think with the overall activity of the customs board right now, perhaps one of us was just trying to consolidate a few members threads. Not sure...