Diego's bandage is soaked with blood when Lila first enters the room. Then when they are lying on the bed there is only a thin line of blood.
In the hardware store, Dave said that they were all out of white paint. Almost every can of paint is white by default and then tinted to a selected color by adding dyes and mixing the can in a paint shaker.
It shows the moon as being a full moon. However, in 1963 there was a full moon on November 1 and November 30. This episode takes place approximately 5 days before President Kennedy was shot, which would make it November 18, when the moon was waxing crescent.
The address of the hardware store is 767 on the sign (top left) and 765 over the door.
The time frame is 1963. However, a 1965 Chrysler Imperial is shown on a street in Dallas, TX.
At about 32.5 minutes in a black Imperial by Chrysler pulls up. From the side it could be a 1964, '65 or '66. Since the time frame is November, 1963, the car would or could be a 1964 since new 1964 models were released in the fall of 1963. However, upon viewing the front end you can see it's a 1965 Imperial. The front ends varied noticeably.