Ahahhaha, is my Sorcerer's Simulacrum also on the road?
Explain to me where my characters are, please.
The Sorcerer and his simulacrum wanted to cast dispel magic on the wizard. Out of necessity, they must have been where the wizard was (ie= as explained, on the road, having LET HIS OWN SIM IN HIS SANCTUM). It was stated by prabe as the beginning of this fight. You chose to cast spell at the wizard, therefore you were at the same place. You also declared that the assassin was checking for traps at the wizard's sanctum, so he must, somehow, have been THERE and not on the road.
I hope this clarification of your own action will help...
So at the beginning of round 3, you are, with a sim, on a road. The wizard you assaulted has fled so far.