There isn't a "correct" way to incorrectly render the interrobang as 2 separate characters. The name was never supposed to suggest a certain ordering instead of just being both at the same time. The name "interrobang" just sounded better than "exclamaquest" (or any of the alternatives Type Talks readers submitted).

Huh, interesting. I retract my previous statement! I'd love to read about this if you have a source.

This series on it https://shadycharacters.co.uk/2011/04/the-interrobang-part-1... was always one of my favorites on the topic.

No, it should be rendered with the proper Unicode: U+203D ‽

do you really think so?!

I think bang-interro just didn't sound as nice and that's probably why it is called an interrobang.