In Episode 7, Zorro gives Joyce Andrews the revolver from his left holster and then he is upstairs and the building is on fire there. In Episode 8, Zorro escapes from the burning building and now has both revolvers in the holsters, but has had no contact with Joyce Andrews since he gave her one of his revolvers. In Episode 8, the water flow is restored after the villains had shut off the valve. But Zorro had left the control room without opening the valve.
Chapter nine: Zorro boards the train and warns Philip and Joyce the tunnel has been mined and goes to warn the engineer. On top of the boxcars(close up)he is struggling to keep his balance. (Long shot) he is running with no difficulty.
Chapter 9: The train passes by the same tree with a branch hanging down.