Thanks! I noticed that too. I believe there is a checkbox option to have those default tags take precedence if you want, but I’m away from my computer & will have to double check.
I just recall I’d left SteemPress as a default tag, unchecked the box, thinking it would still append it as tag #5 if I only used 4 tags, but it completely overwrote it with the post tags instead. I just added it with an edit.
Important pointer you make in regards to the first tag not being alterable!