"Jason Hobbs King" wrote in message
...

It's thread drift and, in line with Usenet convention the thread
has
even been renamed. Live with it or, if you don't like, it just set
your newsreader to ignore the thread.

What convention? No Charter or FAQ I've ever read has sanctioned
this.

The unwritten convention that thread drift happens and the best way to
'manage' it is to rename the thread, prefixing it with (OT) or
similar.