I was having similar problem. If you do file comparsion between the /admin/categories.php and what the instruction ask you do to, you will find step STEP 1.1g has bug in there. you need to chaged it!
eggzero168 replied to bmcewan's topic in General Add-Ons SupportCan I give some suggestions? If I am the customer, and I already decide to use paypal as my payment method, can I skip every thing and go straight to paypal site to pay? 1. If I am already a paypal user, I will not need to enter those personal information again because paypal will have my profile info. 2. If I am not a paypal user, paypal will ask me to enter personal info again. So I will have to enter my personal info twice. 3. By pass security concern because paypal is the one who responsible for secure customer's personal info.