Suddenly in Mail (under Mojave) 3 emails have their short summaries shuffled—the mails are all there but the summaries are mixed up. Rebooting doesn’t fix it. Anyone ever see this?
You might try rebuilding the mailbox with Mailbox > Rebuild.
Thanks. It involved only 3 sequential emails, After reading them and deleting them, it has not recurred. If it does, I will rebuild the mailbox as you suggest.