What happened to the Cirque du Soleil "KA" crabs/ pillar jumping?

I saw "KA" at the MGM Grand a few weeks back in Vegas. It was a Tuesday night. We bought the "making of" DVD to learn more about the engineering of the stage (a fluff filled dvd incidently). HOwever, in the DVD we saw that during the sand scene (with the starfish etc.) there were two acrobats dressed as crabs. Also the DVD showed a scene with pillars in the void (similiar to the ones eddie murphy crossed in the film "golden child") with cast members jumping and fighting from pillar to pillar (not to be confused with the pillars that men swing to and from in the jungle/ forest scene). The thing is at our show we didn't have any crabs or the entrie pillar scene. Is this something they have taken out and why? or where the crabs maybee just sick that night? and what happened to the pillar sequence? It looked fabulous on the DVD. Was someone hurt, or was it a pre-production idea that made the DVD but didn't make the actual show? Thanks...oh and still an amazing show.