Catalina Mail problem. Sender and Subject get swapped with another email

In the last month or so, I've had 8 or 10 emails that have swapped Sender and Subject with another email. For instance, I'll receive an email from George@xxx.com, but it will appear as coming from Macworld Daily. The email from Macworld Daily will appear as coming from George@xxx.com.

If I click on the Macworld Daily line, the email that appears is the one written by George and also displays the correct From and To information. BUT if I reply to "George's" email, the reply is sent to the Macworld Daily address and with that subject.

This is really confusing behavior. Does anyone know a way to manually type in or correct the Sender and Subject. Right now when I look at my mail list, I can't tell which messages (in this case) are from George. See below for the line I have to click on to see the message from George.