Redirect does not function again if user has used "back" button

Hi,

My settings:
Checkout redirect path: user/login/cart
Checkout redirect login message: empty
Continue without register: checked
Use username as order email: unchecked
Use anonymous checkout as option to login form: checken

When a user has been redirected to the user/login/cart page, he is presented with the "Anonymous or registered checkout" options form. He chooses the anonymous option and proceeds to the first checkout page.

When @ the first checkout page:
- if the user presses the "Cancel" button, he is redirected back to the /cart page (which is OK). if he clicks "Proceed to checkout" again, he is presented with the user/login/cart page again (which is OK)

- if the user presses the browser's "Back" button, he goes back to user/login/cart, but now this page does not show the "Anonymous or registered checkout" options. Instead it immediately shows "username" and "password". If the user now goes to /cart and presses the "Proceed to checkout" button, he is not redirected to the user/login/cart page anymore, but directly ends up at the first checkout page. (this is wrong)

Cheers, Léon