I have a A2 flight controller with a Lightbridge which is plugged into the X2 port of my A2. My questions are am I supposed to select DBUS in RC TX type or DR16. If DBUS is correct I am having calibration issues where an error comes up stating the a program quit during stick calibration and the stick throws during calibration are almost nothing and I cannot even get enough movement when I try to redo the calibration to complete the calibration! So I had it configured in DR16. The calibration software for the lightbridge is minimal I assume this is just for camera movment of the camera head is this correct? Help!

You will need to use DBus, what remote are you using? have you done the calibration in the LB first? The LB software is there to assign all channels before moving to the FC software.

Smee56 is correct.  Calibrate and map channels in LB Assistant first then move to the A2 Assistant.  Make sure that you power cycle the LB ground unit.