You’re missing that the only events considered for Response Time are when your company = the seller and the buyer initiates the message thread (ie the buyer asks the seller a question). I believe that’s discussed and described somewhere in the super long/old profile scores thread, but I’ll take a look and try to edit the post to make this clear. All of those exchanges that you started do not affect your score. That’s because we wouldn’t want to penalize you for something like this:
Seller: “Hey, I shipped your order, sorry it took me a couple of extra days.”
Buyer: “Yeah, I saw the notification from LEx with the tracking # but thanks for letting me know.”
So you have to look at only the last 5 events in which the buyer started the message thread. I’m going to send you a message now on this listing from one of my test accounts. If you reply to it quickly, you’ll see your score increase tomorrow.