Yes, the surcharge still applies in a case as you mentioned. This was put into effect to help me recoup the losses when I wind up at the end of the season with a bunch of lone males that I need to sell cheaply in order to move them out. So even with the mix that you mentioned, the only way I could balance that out was if someone order the opposite sexes of the exact same combination. Although that is certainly possible, I wouldn't want to bet on it happening.
BTW, I am intending to reduce the discount to 40 percent when I can get a chance to change the coupon code for the 2004 animals. I actually meant to do that last night.....