Zachary Snyder:
To be fair, in the next email, if you read it, he apologized and said that it was a mistake.
Joe Zeff:
Yes, but I read my email in the order received, no threading, and reply as I read. I've been doing that for about thirty years now, and have no interest in changing.
Well then (said with wry humour), you get to wonder about these things, then... You also get to shoot yourself in the foot, from time to time.
I used to do that, these days I use threading. Either way, I might compose a reply but not send it straight away. If I find that a few messages later my reply would be pointless, I can just delete it.