The room indicated for Step 3 is incorrect. It is actually the room Southwest of what is currently marked.
As commented above, if you get bugged on Step 4, drop ONE group member from the group and task, gate back to the Overthere, and have that individual grab task on his own. Campfire back to the group, and he can update Step 4 by moving into the room (no need to redo any prior steps). He can now drop his individual task, and be readded to the group and task.
What a PITA. Daybreak needs to fix this.