Hi Danni,
That's sounds like a crappily designed or bent cage. My hunch is manufacturers knowingly ship defective cages knowing you won't bother returning a defective $30 cage because it might require explaining things to another person (embarrassment).
I've had some luck with the TERNENCE Chastity Cages from Amazon: https://www.amazon.com/TERNENCE-Medical-Stainless-Chastity-Device/dp/B07DVKFF7L/
Nicole