1. Any Shipping Items not integrated with UPS/FedEx will appear in the More section. These shipping items will all appear in the FedEx/More Carrier dropdown.
2. All Flat rate Shipping Items will also be in the More section and will appear in the FedEx/More Carrier Dropdown.
3. Only UPS Shipping Items using UPS Real-Time Rates will appear in the UPS Carrier dropdown.
-Check this by navigating to Lists> Accounting> Shipping Items> View the Shipping Item> In the Shipping Rate tab> check if UPS Real-Time Rate is selected.
4. To use the Shipping Items not using UPS Real-Time Rate the Shipping Carrier field needs to be set to FedEx/More.