[KardashianKurves]

i use this bra calculator and buy my bra from The Little Bra Company, well this calculator works for me because it says im a 28D/30C and a 30C fits perfectly for me. Trust me, i thought i was a true 32B until i try out the 30C bra! Made my life so much better in the bra compartment

Oh and not to mention you are definitely not a B cup haha

http://www.lindasonline.com/bra-fitting-calculator.html

It shouldn't be giving you 2 sizes because you aren't 2 sizes. YOu're only gonna have one true size that will actually help your boob growth based on your measurements. If you wear the wrong size it can seriously hinder your growth. It worked for you, but if that's how the calculator works then other people probably shouldn't be using it because you don't know how accurate it is overall.