My posts keep merging. Why?

There is no such thing as a "new original post in a thread". When you make a post, that STARTS a thread. Any time you reply, you are replying to an "original post".

Macrumors isn't a "tree-structured" forum. You make a post. People reply to the post. Period.

It is a bit confusing, since you can "reply" to a reply. But all that does is add a new reply to the end of the thread, quoting the reply your are replying to.

Tree-structured forums are a bad idea. Even though I used to run one. I thought it was a good idea at the time...

Can you clarify what you mean?

 

I think what OP is saying is he posted, then when he post again it getting merged as if no other person has replied between his first post and his reply.

I think he saying the forum is putting his reply merged with his first post rather than it being posted after the 2nd person reply.

This is how I am reading this anyway.

OP can you post screen shot to clarify?

 

I have only seen that happen when the replies are back to back, with no other replies from another member between them. It is the forum software doing that.

Even though the replies are of a slightly different topic, it makes sense to make them one post. It creates less sprawl in the database and keeps the thread as compact as possible for readability.