If Amy's father had not said that the balcony door was open, there would be no question about what happened. The table was pushed up against the balcony glass.
Speculation is that the cleaning staff moved the balcony furniture and placed the table next to the balcony glass, but that seems unlikely. I assume that cleaning staff would have a cruise-ship specific furniture layout that they adhered to after tidying up each balcony. For safety reasons, the layout would not include placing a table next to the balcony - turning the table into a step.
Amy was 66" tall (5'6"), the railing is 42" high. Amy had been up all night partying and drinking. If she had a moment where she wanted to lean over the railing to enjoy the morning air or watch the waves, she could have moved the table, stepped onto it, leaned too far and fallen overboard. Where was the ashtray? Her father heard something that woke him up, but doesn't know what it was. Perhaps it was the table momentarily hitting the glass as she lost her balance, or the ashtray falling onto the floor.
The only clue that she did not fall overboard was the open patio door - a tip from the father, who is not the last person to see her alive. The brother states that he is the last person, not the father.
The Canadian
computer systems expert who saw Amy on a beach with two men - did he say that she was a smoker? I need to re-watch the Netflix program to be sure. If so, that's the detail that doesn't make sense. She was with two men who were more or less commandeering her, but she was also casually smoking as she walked? She was under someone else's control, but they bought cigarettes for her?
That witness is the computer expert who used website info - IP addresses (user info available to everyone who runs a website) - and identified locations for those IP addresses. He claims that there are hits from the area where she vanished on specific US holidays such as Thanksgiving, Christmas, etc. What about other days - where's the spike graph demonstrating this claim? That becomes a dead-end (in the Netflix show) for various reasons, but it is an interesting anecdote. Is the
IP address routing through that area, or does it originate at that area? He doesn't elaborate.