I know the paperwork is complicated. Sometimes I think it's amazing tenants can fill out everything S8 needs for a new apt. without errors.
The renewals are usually easy by comparison. However, we recently had a case when a tenant told the Section 8 people he was renewing for one year and the landlord (me) for two years. This resulted in the tenant having the wrong rent and owing Section 8 money and maybe a mess of paperwork for me to fill out and submit to DHCR if I'm to avoid an order from them to raise the tenant's rent to the legal maximum.
Neither tenant nor landlord needs such hassles. So please, when you fill out your renewal papers, take some extra time to make sure you're telling your landlord and the Section 8 people the same thing.