Minimum Order With Passcodes

Hi,

I have a price list set up for minimum order and not allowing photos from a different gallery to be add for that minimum order. The problem is that I have a gallery with multiple sub galleries, every sub gallery has a different passcode and people are able to add photos from different kids in the same order achieving the minimum order with two kids instead of one. What can I do to fix the problem?

"Do not allow purchasing from multiple galleries on the same order" is for main galleries only. I can't think of a way to keep them from adding from different sub galleries in the same main gallery.