I got an email back from Reeftopia today, apparently we didn't follow the instructions, as on an order of this size the minimum split sizes cannot be smaller than the smallest quantity that Reeftopia sells. Chalk this one up to user error. I've resent the quantities and will have to work with a few of you to rebag stuff on pickup.
I've asked them to confirm that this will not delay the order and have not yet heard back. I will post updates as I get them.