I expect so, but that's because sorting by thread and sorting by subject
are different operations. That they yield different results should be
no surprise.

When I didn't know better, I thought that threads were defined by the
subject line. There are advantages to sorting by subject line, and some
readers do not sort by threads unless set to "read all". Including
plonked posts.

My point being that this "bug" doesn't seem "common".

Actually, it is.

Yanno, I don't have a problem with lines longer than 70 characters. My
newsreader wraps them for me. Why should I wrap my lines for other
people?
I don't know; why should you?

Courtesy to those who need that wrap. It's a small thing, but a nice
thing to do.

(Actually, since hard returns are a problem for wrapping readers I'm on
the fence about this one, but I've been asked to wrap so I wrap.)

It's easy to avoid using the colon in subject line prepends. Doing so
makes a better experience for some others. But this is Usenet. Do what
you want. At least now we know what the consequences of the colon are.
I didn't before, and wondered why things got split.

Jose
--
There are two kinds of people in the world. Those that just want to
know what button to push, and those that want to know what happens when
they push the button.
for Email, make the obvious change in the address.