Breaking back out through barricades

[Achtung Panzer]

I just played Supply Run and have a question. Some zombies broke into the Manor through the barricades and killed a Hero. I then wanted them to come out of the Manor for more attacks. Do the zombies have to roll for each time they want to cross a barricade? We thought they'd be too stupid to re-use the entry route.

Also, one of the zombies was now a Zombie Hero but I rolled to see if he could break through the barricade to leave the Manor before rolling his D6 movement die.

Did I play this right?