I have the same question. From the instructions, it seems that it would start by going to 5th, 4th, then back to 0 to drop them off.
Unfortunately, the comment dinglemouse made has been hidden, so I apologize if you already answered this.
(python)

Edit: nevermind. I was able to see that comment. I'll reiterate the rule dinglemouse quoted in case anybody else has the same confusion.

When called, the Lift will stop at a floor even if it is full, although unless somebody gets off nobody else can get on!