Saw the rumor about upgrading the 763 to 764 cockpit recently in the iah cp update dated 9/29 (still in content locker)

Does anybody know why the 76t block hr is down 8000hr for november? (According to the pairing overview on ccs)
Is this a normal seasonal adjustment? Looks like one needs to be north of about 50% in ewr76t just to hold a line!! Seems like a lot of reserves