I think it's weird that sometimes I double post, and other times it merges.
I noticed this too, seems quite inconsistent.
Anyway I'm assuming you mean my octuple posting that happened in clubs haha, which was very strange. If it's any help, this is what happened: at first the page was going very very slow (though I did not click "submit reply" or "post quick reply" more than once, I know better than that lol) I left the page and came back to see if it posted; it didn't, so I tried making it again a few times. And then suddenly I had posted 8 times in a row. After thinking about it, I guess when I left the page and came back to see if the post had posted, it really did even though it wasn't showing up? I have no clue.
Could have been my internet, though no other website was going slow at that time. Today, I couldn't get on Pokecommunity at all until now, it simply wouldn't load. ;___; (working fine now though)
My computer isn't the most powerful so I guess that contributes ;.;
That was a very odd occurrence but other than that it seems most common to just click "post quick reply" and two posts appear instead of one for whatever reason. Sometimes the spam filter thingy picks it up and tells me to wait because I just made a post less than 10 seconds ago haha, other times it posts twice in a row, other times it merges.
If I can throw in my two cents... It is a little inconvenient for sure, but I don't think it's worth completely getting rid of Quick Reply, seeing as soooo many people use it and love it. The convenience of Quick Reply seems to heavily outweigh the inconvenience of deleting a second post occasionally.
of course I still hope it gets fixed.