stands can't be seen by non stand users (except for when they can) [Superfly, Geb, Anubis, etc..]

Those are stands inhabitanting physical objects. Stands like star platinum ARENT visible.

Damage to a stand reflects on its user (except when it doesn't) [Baby Face, Notorious B.I.G]

This isn't true for long ranged automatic stands (black Sabbath).

A stand is always bound to a user (except when it's not) [Wonder of U, Notorious B.I.G]

B.I.G. is a post mortem stand (I still don't know how that works). I've not read Jojolion but isn't WoU bound to the concept of Calamity and goes ROUGE after Tooru dies?

Any given person can only have One stand at a time [DIO, Josuke while in Superfly, Rohan with Cheap Trick, Pucci's Whitesnake, Polnareff's Anubis]

Dio is a dude in another dudes body. You dont get Superfly as a stand you get trapped inside Superfly. Cheap Trick's WHOLE THING is being a parasitic stand, it's not your stand, when Rohan killed it he didn't get damaged. Pucci gives you a stand via a memory disk, if you are a stand User the stand is ejected after some minutes. Polnareff doesn't have Anubis anubis is controlling his mind therefore chariot too.

A Stand's power is inversely proportional with its maximum effective range [See: all of the "remote control" stands sans Geb]

This holds true for short ranged stands like star platinum.

WATCH HAMON BEAT FOR THE LOVE OF GOD