when you create advanced options, the first one you create will be the default option.
set a default option as "Select an Option"
then create the other options after that.
When editing the products, you need to select the option you want to edit to be able to set the price for the product with that option.
the price is not calculated as Price + Option.
each option is a unique product with it's own price.
So Product without options is one product with it's unique price.
Product with option1 is another product with it's unique price.