Using JMRI and USB with multiple DCC systems

JMRI is not plug-and-play. It will not recognize any changes, nor will it make corrections. Even unplugging something can cause errors. The USB board jumpers, the PC hardware configuration, and the JMRI software configuration for each NCE system are entirely different. If you want to use JMRI in two locations with two DCC systems, I highly recommend you get two USB boards. Even in this situation, you will need to make changes to JMRI each time you change systems using the same PC.
 
https://ncedcc.zendesk.com/hc/en-us/categories/201279286-NCE-USB-connections-and-JMRI-Configurations