KNC Sept/Oct 500TH/s is way too low, because September are day1+2 only(?) and ~800 orders [2].
[2]
https://www.kncminer.com/news/news-20 "The number was 890 but has dropped a little as not all bank transfers arrived in time."
I don't read that news item as "890 orders will be day 1+2 deliveries". I read that as "The priority of the first 890 orders is based on order date and not pay date, like the rest of the orders will", so it might not be that bad.
Although looking at reference 6 (
KnCMiner list of orders) though, I see day 2 deliveries all the way up to order 25xx, which could make the estimate of total KNC hashing power way more scary.