Mijoshop 3.0 issues

I have built an ecommerce site in Joomla for a client, using Mijoshop 3.0 for the shopping cart. [login to view URL] I urgently need assistance on two different issues: Sharasale tracking code integration: The purchase information is getting stripped before it can be sent to the sharasale account. I have successfully gotten the order id worked out but the sale amount is still giving issues, so that part is what I need help with. Custom shipping field: Need to add a checkbox field to the shipping section of the checkout process that asks "Is this a business address?"