DragonBoatGirl -
I just checked the UofR business major page and came up with different information than you did. Hopefully this link works:
http://www.rochester.edu/college/bsb/undergraduate/ba-degree.html
If it doesn’t, what it says is that “the BA degree in business consists of eleven courses with a calculus prerequisite”. On that page I did not find any indication that a second major was required beyond the B.A. in Business. I could very well be wrong, and would be interested to see the information you have. You will see that the linked page indicates there are eight “core” courses for the BA degree, which is where the confusion might have been sown.