This could happen! Not all bodies were created equal and trying to standardize them is useless - size charts are just a guide to help you determine what YOUR best option is.
If you’re still on the fence, go for what your hip size says. We’ve found that customers who based their purchases on hip size felt a lot more comfortable in their shapewear once it arrived.
If you’re looking for extra compression, then go for waist size. This doesn’t work ALL the time, but some of us do like that extra snug fit in our tummy area. Your body, your choice!