From the article :-
[the Jeep Grand Cherokee] lacks the third row of seats which many rivals have as standard or as an option.
But there is the option. The Jeep Commander is a Grand Cherokee with a different body shape (more like the old Cherokee) and the third row of seats. On the jeep-club.co.uk forum they share the same sub-forum because they are identical for practical purposes. The Commander (designated XK/XH) was only made 2006-10 and corresponds to the Grand Cherokee of 2005-10 (designated WK/WH), the model before the current one.
Commanders are massive (higher, and about 2" wider than the Grand) and quite rare. The downside of the third seat row is that the rear floor is not level when folded down. I think you can remove them entirely though.