I have purchased and used this type of bra several times. I recently ordered 3, and they were all the same ........ Uneven thickness...... Thin outer edge was folded in and stuck to the inside.  Very "lumpy" looking when I wore them. Could be wrong, but these appeared to be "seconds" which is probably why the cost is cheap.

I threw all 3 bras in the trash. In this case, "You get what you pay for" rang true.