When Molly holds the ice sample there's air in the bag. The bag would have been sealed outside the spacecraft, so would have been vacuum sealed. It would be necessary to get the sample home in this state to avoid contamination.
When Baldwin and Cobb are in the LEM they move as if in Earth's gravity. When they are outside they move as if in the Moon's gravity.
During the watch party for the Apollo 15 landing, Wayne goes outside and looks up at a nearly-full moon. This is most likely mid-to-late afternoon, since it's 6:00 when Karen brings the party to a close. However, when the moon is full, it's on the opposite side of the earth from the sun, and therefore only visible at night.
Clayton Poole says he was with the 21st Infantry Regiment, but is wearing the shoulder patch of the 196th Infantry Brigade.
Seahawk has a panel that is clearly a back-lit blue background LCD Screen, however, that technology then was just breaking into Room Temperature operating LCDs in 1984, and additionally that particular type of LCD using a colored background was not invented until 1984 by Sharp Electronics shortly after the room temperature LCD was invented.