Q: How does a subject line get changed to accurate reflect what is being discussed?
When the discussion changes several times from the original post, someone will suggest changing the subject line.
Several more "I agree" posts will be made with the same subject line.
By this time the moderator will notify all that the current postings are off-topic for this list.
There will be a couple more postings with the original subject line asking where this type discussion can be held.
The archives become filled with subject lines which have no relation to often valuable information contained within.