Vanity Fair Womens Hi Cut Flattering Lace Panty Underwear Lavender 8 X-Large

I have worn VF undies for years. I used to buy the lace hi cut, but didn't see them when I needed to replace them. I ordered size 6, polka dot and same size solid black. The polka dot undies fit great, generous coverage, stay put around the bottom, with a nice thick lace waistband. Fit perfectly. When i opened the solid black, it was smaller, rides up along the bottom, with a thinner lace waistband. Now I have 6 pairs of polka dot great fitting undies, and 6 poorly fitting black undies, which I can't wear under anything where a panty line shows. Someone needs to send a memo to quality control!