I have discovered that when setting up a mix and match offer and establishing the line groups along with the number of items needed in those line groups, that this field acts as a minimum and a maximum. This limits the ability to offer a discount where a customer buys one item at full price and also can receive a % off discount on associated categories with that purchase. I believe there should be a way to have a minimum number of items specified as well as a maximum number of items specified (2 different fields) and they should be independent of one another. This way you don't limit the number of discountable items a customer can purchase.

This would also simplify having to set up multiple mix and match offers where you change the line group number to continuously be greater than the first line group. When you have over 10 items you want a discount to be applied (i.e. 247 items in the category you want to discount), this isn't possible to maintain and would take a great deal of time to setup. It would also be hard to even average the number of items a customer may buy that would be discounted.