This are usually happens when I typing before I think.
With aid Your explanations it work ALL. It remind me what I've done few days ago (age???)
I'm totally agree with "guideline" in place of "rules".

I could add a "update all" or "update selected" button in a future release

I don't think is necessarily.

this means this plugin will leave the Plugin manager, unless we upload the sh3p file separately

Unfortunately, BEFORE read Your answer, I've already repack and upload "AS IS" on Source Forge.
Now I wait the owner reaction (I hope he doesn't beat me).