Daycare requesting 6-8 oz bottles of breastmilk?!?!?

My LO is 7 months old and loves his milk and all foods (eating solids, 2-3 meals a day like a pro!) I pack 18 ounces of breastmilk for daycare (4 - 4oz bottles and 1 - 2oz snack), to cover his 8 hours at daycare each day. I feel like this should be more than enough, given that the standard is 1-1.5 ounces per hour, but they are demanding more milk. They have asked for 5 bottles of 6-8 ounces each, essentially wanting me to double what I am currently providing. My LO has never taken more than 4-5 ounces at a time.

Am I in the right or the wrong? They are kicking us out of daycare effective immediately saying we are not following the nutritional guidelines for babies his age. Doctors have never had a concern with his eating or his growth. I feel like my information is correct, but am I missing something?