Why are webmasters so god damn stupid?!? 
Rhetorical question?
If not ...
Ours is an industry with very few standards of practice with conflicting, and sometimes confusing termonology. I assume most anyone in your end of the biz would have the daily task of weeding out the unacceptable - or spending time adjusting the sign up process to better idiot-proof the system.
I'm a pretty smart cookie w/ 100s of sign ups under my belt .. and I've found many a webmaster area so poorly written, or difficult to navigate, it is very easy to make an error - or in my case, pass it on by.
Stupid is as stupid does.
Mrs Gump
Edit
I was gona add some sites to yours ... but being cussed at, just doesn't make me want to go much further.