Add to Cart not redirecting to basket page?

Choose the "View / Buy" button for the first product on the following page to get to a product detail page:
http://www.ledwarehouseuk.com/LED-Spotlights.php

...when I click "Add to Cart" it just re-directs to the same page yet "shopping-basket.php" is defined as the redirect in the Add to Cart behaviour.
Is this a bug?

Also, I've been methodically following this tutorial:
http://www.webassist.com/tutorials/Add-dynamic-product-options-II-eCommerce-Series

...and it has worked out pretty well, but there are odd things happening within the wizard dialog boxes:

1) In the "Update Add to Cart button" section (mid-way) it states that you should not bind the colour to any field but, rather, make it updateable. I followed this, but every time I go back into that section Colour has a binding? Should it?

2) When I initially select an option for, for example, Size, it doesn't update in the view so I'm never sure if it has done it or not without either having to click OK and then go back into it again or by clicking elsewhere within the wizard. Again, this seems more like a bug than anything else.

Hope someone can help me. Thank you.
Regards
NJ