Review on Pleated Adjustable Uniforms Girls' Skirts & Skorts in Stretchy Bienzoe Clothing by Jeremy Nunez

So I have a little 5 year old girl and have deviated from the recommended size in the attached chart. I expected to use an adjustable waist no matter what. However, the skirt goes from clean and tidy to quite messy, only pulling down each side three notches. See attached pictures. It's a good length, so there's no problem here. I'm almost tempted to sew a rubber band cover in hopes it will help my back lie cleaner. I can remove the stitching if that doesn't work. I'm a seamstress so I might just try on skirts for her. I do not know yet. But because of this problem, I don't like the skirt at all. But if you don't need waist adjustment, it fits perfectly. Also, the shorts are definitely polyester on the inside. I'm not a big fan of synthetic underwear, nor do I let my daughter wear synthetic blends for the same reasons. I think underpants should be cotton for breathability.