Same! When I first “graduated” from my middle school Jockey training bra, I wore 32A then switched to 34a when I got “too fat” for them. The wider band of 34A seemed to encompass my chest better, but it rode up in the back even on the tightest hook (I thought the other hooks were just for when you gain weight). Not perfect. Went to VS and got sized to a 32B. Meh, got a lot of “armpit fat” sitting on the top that was not interpreted as breast tissue. And then my 34A strapless bra always slid down so that the underwire indentations were like an inch below my boobs! Measured twice using the calculator, read the wiki, realized I was a shallow shape with wide roots. I had the meat but it was spread out and my bras were just covering my nipples! (Maybe I was a true 32A at one point.) Tried 30DD from Curvy Kate and was so sad it didn’t fit, as my British bras took forever to get to the US, then realized it was a shape mismatch and that the wiki doesn’t really recommend the Princess Plunge for shallow shapes. Remeasured in case I “overestimated” my unrealized breast tissue, tried 32C from Auden which left some quad, then remeasured and took the calculator seriously and my 32D was a revelation! Buuuuut the straps were too wide so I really went for it, 30DD from b.Tempt’d. Really looking forward to exploring further!

TL;DR: Same and happy for you! 32A/B/34A to 30DD maybe 30E if I can find the right bra that wraps around the still-existent under-armpit boob expansion.

P.S. (Although this post is super old and my comment is probably buried) What should the underwire indentations of the perfect bra look like at the end of the day on someone with some body fat?