A customer just brought a situation to our attention that has me a little confused. When a user adds an item to their cart in our store, enters their shipping zip, then clicks 'update cart' they are shown their total. However, when they click the 'checkout' button, the total is higher when they reach the PayPal page. It seems to be consistently adding $2.50.
We are charging shipping, but not handling or sales tax. Any idea why this would be happening?