Ugh.
I've never dealt with Title 9 - any chance they might refund your money?
Pricier and still Chinese, but my SW midweight long bottoms wear like tights and they've held up fine so far, although I'm only starting my second season with them. They're much lighter than what I'd call midweight - lighter than my midweight SW tops - so I'd have to guess that their microweight long bottoms must be in the range of pantyhose weight.
The JonesWares running tights I just got are really almost pants - heavyweight wool, with a rougher (but not at all scratchy) feel. I'm really loving them. Unlike the tank, they fit me just perfectly.
Speed comes from what you put behind you. - Judi Ketteler