I would guess that the "west" channels are being eliminated because they only repeat the broadcasts of the "east" versions of the same. The east/west versions are basically mirror images of each other in programming.
New York on Demand to be added to channel 1007. Channel 1125 Cornerstone to be deleted. WRNN, Kingston, NY, to be deleted on or around August 30, 2010 (except for Kinderhook).
On or about September 2, 2010, the following channels are to be deleted: Starz West HD Showtime West HD HBO West HD Cinemax West HD
On or about September 2, 2010, the following new services are to be added: HBO Signature HD HBO Family HD HBO Comedy HD HBO Zone HD Action MAX HD Thriller MAX HD More MAX HD OuterMAX HD Five Star MAX HD @max HD W MAX HD TMC Xtra HD
On or about September 7, 2010, the following services are to be added: National Geographic Wild HD MTV HD Comedy Central HD Nickelodeon HD Spike HD
On or about September 13, 2010, the following services are to be added: History Channel International HD Country Music TV HD Hallmark HD VH-1 HD Cooking Channel HD TWC Sports HD.
Looks like we got all the new movie channels! They're spread out pretty weird now, which the originals starting at 1880 and the new additions around the 1780s. Hopefully the shuffle things around to keep all the premium movie channels together.