I am glad you are working on this! I have been plugging along with it in NA as well. As long as you are updating the firmware, my thought would be that you configure the firmware to match each CT to the leg the measured circuit is using, rather than trying to choose the CTs to match the firmware’s expectations. See this part of the NA topic: emonTx V4, emonVS in North America - #26 by Robert.Wall
Can I ask how you connected your emonVS to your breaker panel?