Perhaps I am missing something?
Quite a bit, actually.
I should probably refer you to various references on how the Apollo color TV system worked, but I think I can summarize it concisely enough for our purposes.
Except for Apollo 11, which flew a special slow-scan camera, the color TV cameras on the moon were ordinary, US standard B&W camera tubes with a rotating color wheel in front.
A US standard analog video signal was 30 fps (actually 29.97 but I won't quibble) consisting of 525 lines. It was divided into two fields, one containing the 262.5 odd-numbered lines and the other containing the 262.5 even-numbered lines.
The field rate was therefore 60 Hz.
The rotating color wheel carried red, green and blue filters, in that order. The filter changed after every field (not frame), i.e., 60 times/sec.
So the signal going to earth consisted of a US standard B&W TV picture in which each successive field was exposed through a different color filter.On earth, this signal was converted to the NTSC US broadcast standard with a special-purpose electromagnetic scan converter using a rotating disk similar to those just beginning to be used for sports slo-motion replays. This particular disk had 6 tracks and spun at the field rate (60 rev/sec).
During any given field (1/60 sec interval), one track was being written with the field coming in from the moon, another was being erased, a third was idle, and the remaining three were read in parallel to produce an NTSC field.
So when you still-frame a recording made from the output of this converter, you are seeing an NTSC frame (1/30 sec) composed of two fields (1/60 sec each). The first field was constructed from three separate camera fields taken at times t-4, t-3 and t-2 and the second field was constructed from camera fields at t-3, t-2 and t-1. Each field represents a separate exposure through a different color filter.
To recap, if the incoming field sequence (at a 60 Hz rate) looks like this:
1R 2G 3B 4R 5G 6B 7R 8G 9B ...
then the NTSC frame might consist of
field 1: 1R 2G 3B
field 2: 4R 2G 3B
which uses the same green and blue fields but two different red fields taken 3/60 = 1/20 sec apart. Or you might get
field 1: 4R 2G 3B
field 2: 4R 5G 3B
in which the same red and blue fields are used but two separate green fields 1/20 sec apart. Or, for completeness:
field 1: 4R 5G 3B
field 2: 4R 5G 6B
in which the blue fields are different.
By now you should notice a pattern. As you step through the NTSC frames, two of the three colors remain the same while the third color is drawn from two separate camera fields taken 1/20 sec apart, with the pattern rotating through all three colors in a 3-frame cycle.
And by now you should finally understand that there's more going on here than you probably thought.