I am having a similar issue. Have 8 mini trees set up as 4 each on 2 different channels. Trees 1-8. Using a falcon 48. Trees 1-4 are on channel 4d and 5-8 on channel 3c. 5-8 work as should. 1-4 do not match. Have checked Falcon setup, the E1.31 setup and string port setup both are set to start at 12475. Have compared everything to the tree 5-8 setup and cannot figure it out. Have not tried starting one model at a time. Will try that to see what trees 1-4 are actually responding to. But, I still cannot figure out why when everything looks like it is setup right.