Good bra but cup bigger than I expected

I measured myself correctly according to Lady Grace's site. I'm sure it's just one of those things where everyone's body is different, but I had to have a seamstress friend reduce the cup size for me. The straps won't stay up to save my life, so that's the big problem. Otherwise, the sides hold up well with the stays and are very wide. It's only mildly uncomfortable in terms of the fabric not being soft enough. They discontinued this bra. Grab one if you can find one online somewhere!