OK good evening all
The shop that I bought the dumbo of have been in touch with dumbo support
Have have been told that the 10 model numbers will store the trims for 10 trucks but unlike my Noble tx where you can go to your model number and that is the only number that will control the truck
But on the dumbo fdd 350 all the model numbers will control any truck you have bound to the tx
So you must only have 1 off your trucks turned on
Hope this helps anyone in the same prediction
They have said its a low cost radio and that's why it's like this and built to be like this
Manythanks to all who messaged