Your set commands are completely off. In BehavEd use the upper one which says set(< E"set_types" >, <str>), then you get a drop down that lets you select what to set which won't let you enter nonsense like NPC_Doctor or set_navgoal_1. After you select something from the dropdown, press Re-Evaluate, then enter the correct value on the right.
Your waypoint_navgoal entity settings are also kind of weird. You've correctly set the targetname, but you also have erroneous waypoint_navgoal_1 and navgoal_1 keys; you can delete those. Oh, and you should probably know that you can pull down the "........" bar on top of the entity settings to get descriptions of the valid keys. (I have no idea why that's hidden by default.)