>Luv N Haight is one of the most advanced funk songs ever.
>Stand is a simple pop song.

A simple pop-song would not change like that.

>Stand has a funky coda/ending but
>that doesn't make it a two part song. Lot's of 60's/70's songs
>had a different sounding endings than the rest of the song -
>just a flourish or whatever. Doesn't make them 2 part songs.

It's not a flourish-it lasts quite some time and has a VERY different sound and rhythm. And yes, a couple of 60's songs have radically different sections and if they have two, I would call them two part songs. Beach Boys "Good Vibrations" is a multi-part song.

>The ending of "Luv n haight" shares the same music as earlier
>parts of "Luv n haight" so the ending isn't a complete new
>thing like the ending of "Stand" is completely new to "stand".
>So I wouldn't say "Luv n haight" is a two part song either.

I think it is. You are right that some elements havce appeared earlier. However, the overall infrastructure of the song clearly changes from a verse-chorus song to a reptitive chant over intense music. I have no problem calling it a two-part song...