ORIGINAL: Mode One
Huh, Piper and I disagree for once! Who'd a thunk it!
Go figure!
ORIGINAL: Mode One
If you use the "Reply" button, great! If you don't then the reply is to the person posting just ahead of you, whether that is to whom you are replying or not. You don't feel this is confusing? Can you explain why you don't?
Here's a test, to whom is this post replying?

Nope, I'm not talking to myself (at least not THIS time).
If you put the post in context, by quoting, mentioning the person's screen name, or writing what you're commenting on, it doesn't matter that the reply to field is wrong. However, if you actually are replying to the last post, the post reply button field will be correct.