Thanks for pointing that out David; I should have read back through the posts before...
You didn't say anything wrong:
Jim mentioned "Orange in Bloom" and you pointed out that it begins with a subdominant chord, which is true. We named a few others which also have that property. The fact that OMO ends on a subdominant is a different matter.
But to answer your point about tunes ending with a subdominant chord, what about another Fieldtown tune: Shepherds Hey? (Signposts) It's another of my favourites.