Using Magento 126.96.36.199, I created a configurable product. When attempting to add the product to the cart, it forces selection of the same option twice before the product can be added to the cart. Goto http://fattjoints.com/mag19/ and attempt to add Test Product 2 (Bob Marley) to the cart for example.
When you created the configurable product, did you accidentally select more than 1 configurable attribute? Do you maybe have 2 instances of iDelivery?