Near the 10-minute mark, when they are driving in the desert, they are in a blue Mustang coupe. When they arrive at the gas station, their car has magically turned into a blue Mustang fastback.
When the couple stops at the gas station, they park past the pumps and get out to talk with the mechanic. In the next shot it's moved back to the pumps without anyone getting back in to drive it.
During Lee's second dream, he is nude when he gets out of bed, but the elastic band of underwear is seen on his waist along the bottom of the screen in the next shot, while he undresses Diane.