For your information, renewal quote will always consider validity start date from next day of license expiry.
As per internal records, cert# 660N-50R4-BV4Q is expiring on Apr 23, 2017; hence we cannot offer renewal validity period from 01 Nov 2016 - 30 Sep 2017.
I believe there is some disconnect, you need to validate asset details with reseller if you want renewal validity period to be matched (01 Nov 2016 - 30 Sep 2017).
Let me know, if you have any query.