Mine came in one box. One HUGE box. So big I could have leased it to a couple families. I have a feeling the one listed in first post was an issue with an error on Rural King's site. There is a model they make with a similar number but WAY different pricing structure. So I could see RK getting a wrong number in there. Home Depot shows it at $999 Sam's no longer sells it. If you pull a search on the Sam's web site it no longer even lists it. The link you listed is an old one. No longer valid. Amazon does not list it. They only show it's little brother (705 2B)
So, I really believe it's not a RK only model it's RK simply swapping a couple numbers and making an entirely wrong listing. Also the 1100 2B does come with a cover in the box. Unlike the one with similar number which is about half the price and does not come with cover. Also that other model's controller will only run to 450. Whereas the 1100 2B does have 500 available. That is one thing about Z. They make WAY too many grills, many with similar numbers, model names and features but at different price points. I think it's because they were OEM building for other companies for so long, and now they're trying to "get their feet wet" in the US market under their own label.