Question: At the Vermont lodge Judy is dancing with the same male dancer that Betty dances with at the same time in New York City at a nightclub. How can that happen?
Answer: George Chakiris is in the background as a dancer in Vermont, but then mysteriously shows up in New York.
Question: Why does Wallace change his tune suddenly when offering the Haynes sisters a drink on the train, considering that a few seconds before he was not too pleased because Davis had given their tickets to the sisters?
Answer: While initially not pleased their tickets had been given away, Wallace used his war injured arm to gain passage (a running gag in the movie) and once on the train it no longer mattered that they did not have tickets. Besides, they were very pretty girls that they already knew and liked.
Question: What is the white drink the bartender makes on the train?
Answer: Orders a Malt just after Mary orders a lemonade.
Answer: Vanilla-rum malted milkshake.
Answer: Definitely not a daiquiri. This looks like a shaken drink. Blended daiquiris were not a thing in the 50s.
The frozen daiquiri was invented sometime between the late 1920s and early 1930s by a Cuban bartender in Havana, using shaved ice and an electric blender. It was a favorite of Ernest Hemingway and became popular in the United States in the 1940s and 1950s, along with other tropical cocktails. Cuba and Cuban culture were fashionable during this era, at least until the Communist takeover. To clarify: the foursome have various beverages on their table (coffee, lemonade, a malted milkshake, and two other drinks). In the foreground, the bartender is pouring the slushy white drink mixture into four cocktail glasses sitting on the bar. That is when they sing, "Snow," and is what looks like frozen daiquiris. The scene is on YouTube.
Question: When they got ready to leave the train, Rosemary Clooney was helped down from an upper berth in a hallway. What happened to the private room that the sisters started out in?
Answer: The "up all night" refers to the original plan for Bing and Danny to exit the train in New York. When the plan was changed to continue on to Vermont then probably some people got off in New York (or elsewhere) and opened up a hallway berth. The sisters took that and Bing and Danny got a room as well.
Question: What ribbons does General Waverly wear and what is the one by itself on the right side of his uniform?
Answer: The ribbon worn by itself on the right side of General Waverley's uniform is the Army Presidential Unit Citation Ribbon. It is a citation issued in the name of the President of the United States to Army units for outstanding performance of duty after 7 December 1941. The design consisting of a 1/16 inch wide Gold frame with laurel leaves which encloses an ultramarine blue ribbon was approved on May 30th, 1942. The rest of the ribbons on the left side of the general's uniform are presented to individuals who perform various duties and/or achieve successful milestones of military service. A chart of medals and ribbons can be found at: http://en.wikipedia.org/wiki/Awards_and_decorations_of_the_United_States_Armed_Forces.
Answer: The actors appear similar but they are different people. John Brascia danced with Vera Ellen in Vermont. George Chakiris danced with Rosemary Clooney in New York.