My point is that some effort should be made to define the behaviour
Your original point seemed to revolve around expected behaviour, not documentation, but anyway...
I believe this thread is a testament to the effort made to sufficiently define the behaviour for you. Has it not been sufficiently defined?
If you meant the help file, you're barking up the wrong tree. Adjustments to the help file are rarely made. You can feel free to suggest it, but it's not likely to happen.
One of the great things about mIRC's community is that there is a relatively active forum and at least a few IRC support channels whose purpose is to act as an addendum to the help file. The help file will
never be perfect or cover every detail of the language, so, in cases like these, a forum or IRC channel is a much better source of information. There is also a
wiki that has some interesting information.
With that in mind, why is a response on the forums not a sufficient description of the behaviour?