As we inch towards the Ork Codex, rules and unit details start to break.
Rumors of upcoming Ork formations/rules:
Well, the removal of the looted wagon fits the pattern we have seen starting with Codex:Tyranids of GW cutting units that have no models. I assume that all those enterprising mekboy hobbyists out there will find a way to convert their looted wagons into something else. Orks (and Ork hobbyists) are the masters of recycling!
much more info here
~Scuttlebutt says look for the Codex in week 3!!