paypal wont allow you to send the style and size columns as separate lines.
they can only be concatenated to the existing ID or Name line.
you need to edit the existing shipping rules and add another trigger so they wont be applied if the pickup session is set to 1.
you have created a new pickup rule, this wont work. the other rules need to have another trigger added to them:
Based on session variable value:
Session variable "pickup" is "<>" a value of 1