The extra ETL is based on store needs. Some stores choose to use that spot for something non-AP, such as additional salesfloor ETL.
Without giving my store away, we are around that level but we have 4 APS and more TPS hours. At those levels Senior AP leadership has more flexibility in giving stores more or less resources, so not every risk 9 will have the same amount of hours. Risk 10 stores are very rare, only 8 or 9 of them in the entire company. They also do around $100 million in sales and are crazy to work in.