There's obviously real dislike with Corey and Kendall. Kendall's face at the Ferrari dealership showed she had no part of him and it continued to be obvious in Palm Springs. Kourtney also was quick to side with Kendall.
Good for Kourt for her reaction to Khloe's baiting her with her not bring present comment. Her kid was hungry and she got up to get him some food. Shows how much a parent Khloe is if that's something to attack Kourtney over.