[SBF]

I have this add-on installed. One problem I must not be configuring correctly ...

I have the following shipping methods:

UPS Ground
UPS NDA
UPS 2-day
UPS 3-day
USPS Priority
FREE SHIPPING

When I add something to my cart that gets "FREE SHIPPING" obviously it should show up as a shipping option to the customer. However if they buy a second or more products that DO NOT have free shipping shouldn't that "FREE SHIPPING" option be removed at the time of checkout?