You need to uninstall VSPManager and use the FlexRadio ports.
After you uninstall VSPManager, open SmartSDR CAT and click the "Delete all Virtual Ports" button, close CAT, and then reopen it. CAT will start fresh with the lowest port pair available on your system. You can then add ports as needed.
Just to reiterate, "Dedicated" port always have one end tied to CAT, "Shared" ports are just virtual pairs that you can use with apps like DDUtil, and "PTT" ports are just that.
Drop me a personal email if you still have problems.