Problem with validation redirect

[eluser]jacobson[/eluser]
I have a form with some validation. All data from the form are being processed to the process method in register function. There I set the validation rules and check whether errors appeared or not if so code $this->index() "redirect" the site with errors on my register site appeared. If I use the redirect('register') it does redirect to the proper site but errors do not appear. But it's not a problem with $this->index() or redirect('register') it's a problem with the URL which still shows the process in the URL after submitting the form.

In my index function in register controller I only load the register view.