OK I had a buyer purchase two items today he put in his cart and at checkout it gave him free shippng. I do not offer free shipping. it was not supposed to be free shipping. What is going on.? I also had numerous buyers claim the ad says free shipping on my listings - BUT I do not ship for free . What is going on.? Im out just $4.30 here but is there a glitch ? What is going on - I do not want to get negative feedback because of this issue.