Hey Wayne,
if with “control box”, you mean the Onefinity Controller, this is wrong. The Onefinity Controller can not power the monitor. Please refer to the Onefinity Manual, page 38 and 39 on how to connect the touch monitor.
Be sure to have all three(!) cables on the monitor connected correctly. The USB cable for the Touch device has of course to be a fully populated USB cable. A charger/power supply USB cable will not work.
The in-detail explanation why you need three cables is here.
Attempts to power the display by the Onefinity Controller may cause the instability of the system you report. I would solve the monitor power supply problem first.
For 2.) it is difficult to diagnose what is the problem. Have you checked “Help! My Toolpath says ‘Under’ or ‘Over”! (with videos)” yet?