+Ti is in the creative function slot in his model, unless you want to dispute that.
So Ne+ and Ti+ refer to two functions in one type's ego block? That makes even less sense. Normally the +/- sign has to differ between these two.

I agree, but the bolded sounds like a minor disagreement about semantics with respect to the preferred alternative.
No. It's a corrupt practice that places a misleading emphasis and has a direct degenerative effect on one's understanding of socionics.