When I respond to two different people in one thread, basically carrying on two conversations on the same subject, it makes no sense for the two messages to be merged.
Troy2000 - I can see it becoming a pain sometimes. I do it so post requirements to access certain parts of the sites aren't just flooding the forum with useless posts, such as "COOL", "OK!" and such...
NRAJoe - Can't narrow it down to anyone one single member...
It is set for auto merging every 5 minutes...so if you make one post and then another within that time it merges.