Exactly, even this run is using house rules, as the official rules state that you are required to own all properties of the same colour before building, and also that houses must be built evenly on each property.
this isn't true about either the blog post (buys boardwalk and park place, purchases houses evenly on this complete property group) or the comment above (no houses or hotels are involved)
You are correct, I guess my reading comprehension isn't what it used to be. I thought I saw an error and got blinded by the rush of posting a correction.