Lol what do you mean never could figure it out? The yellow channel (day) is on when the blue (night) are off. Once your 2 yellows turn off the 2 blue turn on. The white ones are full time power.
These timer strips are for aquariums who run a reverse light cycle refugium or moon lights/both. In one scenario you could have a 4light T5 fixture with 2 plugs (2 bulbs per channel). While you can not do individual timers per outlet, you can control both outlets for one timing function. Once your display tank light turns off your refugium light turns on promoting pH stability around carbon dioxide.
You could use the other switch for a faint blue moonlight LED
in the display I suppose too..