Okay. It's just that this:
<Multi-Element: x>
<Multi-Element: x,x,x>
<Multi-Element: name>
<Multi-Element: name, name, name>
is a completely different thing from this:
<Element: Fire, Ice>
<SubElement: Thunder, Fire>
They're two (three) different notetags that serve completely different purposes. Giving skills multiple elements for the purposes of damage calculation is one of the described purposes of the plugin, and that comma-delimited format is shown in the plugin instructions for that notetag.
The main and sub-element traits for actors serve a different purpose, are stored in a different format, and use different notetags.
I'm merely trying to reinforce that because a plugin provides a notetag with one syntax, you can't presume and recommend to others to put that syntax into a completely different notetag.
Anyway, I think the question has been addressed, I'll bow out. Good luck.