Not namecheap. They use the same form for signup and login but show two forms on the page, so if your browser autofills the login form, and you fill out and cl

Not namecheap. They use the same form for signup and login but show two forms on the page, so if your browser autofills the login form, and you fill out and click submit on the signup form, it uses the user information from the login form to log you in. And, since it asks for login >after< you have selected checkout, it will then complete your purchase on the wrong login. I found this out the hard way when I purchased a domain from them, but had my work's credentials stored in my browser: I bought a domain for my wife using my employer's namecheap account. Of course, their help desk was convinced that there was something wrong with my browser.