Oh my... I wish I was better informed about the "advanced variables" two days ago, because this is the answer! Another member who has been answering me on behalf of your plugin told me not to use the "advanced variables" option, because the latest version of your plugin had a better way of creating the paypal button.
I have been wracking my brain trying to figure out how to find a workaround to this problem.
I think all of my little road bumps with the use of this plugin are finally solved.
Thank you!