[Measurement Check] [Recommendations?] Currently wearing 34C, but suspected I need a 32C. Calculator says 30D with 32C as a sister size.

Does the 30D calculator result seem right? My measurements are: Underbust (comfortably snug) 30.5 Underbust (as tight as possible) 28 Bust while standing 32.5 Bust 90 degrees 34.5 Bust lying down 34

I believe I have average projection (maybe just a touch shallow/wide but mostly average) and even fullness. I've been wearing a 34C and though I haven't had any specific problems, I think I can find a better fit. What bras should I order to start out looking for a more precise fit?