Maybe I know the different, maybe not? PMA is a GUI (like Adminer) tool to access databases and makes it easy to run commands. MySQL is part of server stack that is used to store data in tables.
A few weeks ago, I installed a very simple, stock webinonly wordpress setup and the default port was 22222 and I never changed it. Any ideas? You recommend I change that right away?
No, I did not change anything.. really. I just used the Webinonly deployment to setup wordpress, SSL and add HTTP auth with SFTP access.