If I can also make a suggestion.

Go to the Freedom Kilts section of this forum and have a look at the "How to measure yourself" video.

Don't pay any attention to the slope part, that is only for my Contemporary Style Kilts. But the part where I show the three waist heights of kilts may help you to understand the differences.

Also pay attention to where I show how to measure for the Fell length. Then check your kilt and see if the Fell is in the same approx. location.
A Traditional Style Kilt should have a Fell that is 1/3 the of the Drop of the kilt. Or 1/3 the distance from the bottom of the hem to the center of the top straps.

Then, to find your natural waist get a belt or piece of webbing and cinch it around yourself just under your ribs at the side and just covering your shortribs in the back. Cinch in in fairly tight. Then walk around for about 10 min.. Sit down a few times and squat a couple of times. You will find the belt will settle into a natural place on your body slightly above your naval in the front and just covering your shortribs in the back. That is your natural waist and that is the place the top straps should be.