This ever happen to anybody?

....I ordered a new Magnetbra earlier this year, never put it on all summer. I also bought a "new" one from someone on here I think, just don't remember who.
I was getting the VX's ready for a photo shoot this weekend and wanted to put them on. The new one fit perfectly and looks freaking awesome. The other "new" one is literally 2 inches off, won't fit at all, too small.
What are the chances that it's defective?
(Maybe that's why it got sold to me in the first place)