It's just as bad when sites won't allow me to enter it as a 15-16 digit string. Another gripe is when it requires me to tell it what kind of card it is, when i

It's just as bad when sites won't allow me to enter it as a 15-16 digit string. Another gripe is when it requires me to tell it what kind of card it is, when it also then validates the BIIN, and tells me I'm wrong if I forget to chose - why not just fix it for me?