To bad that info is all wrong.
Turns out that is the wrong story.
The part about Bubba and OG Kush are wrong.

OG Kush = (chem/dawg x (Lemon Thai x Old World Pakistan Kush)

West Coast Dog = OG Kush crossed with an indica.
3rd backcross to OG Kush is Dog.

Bubba Kush = (West Coast Dog x Old World Paki Kush) x OG Kush