The women are there are very knowledgable. There is a lot more to bra fit than band and cup size. Just reading will help you evaluate bra fit and find brands that will work for you.
I finally figured out why the Cleo Lucy doesn't work for me and what my figure is. Not low slung as I thought. Now I understand why some Panache Cleo bras work for me while others I've tried don't.

Bra fit is very confusing unless you have a very good fitter. Yesterday I observed women in the cafeteria at a local ski area and it was amazing the number in poor fitting bras. Just looking at their backs it was obvious that their bras didn't fit. Bands riding up in the back are the most obvious sign of a poor fitting bra. It didn't matter size, shape or age.

Sorry about the rant but it's unbelievable to so many women in such poor fitting bras.