Technican Form calls a different model in Incident Management that skips a large part of the main model with the initial set up. I would not recommend changing this unless you have a really good grasp of how to modify Workflow projects.
I cannot look at the flows right now, but the easiest way would probably be to copy the components that do the routing from main model to the one Technician Form calls. That might be a bit more involved than it sounds though.