How to build a lawn sprayer set up the Right Way Part 2

I go into depth to explain how sprayer system is supposed to work. I do not have any fancy camera setups. I'm just using my phone and here is the actual math 126 oz every 33 seconds in one minute I put out 3.82oz every second times that by 60 seconds equals 229.2 oz every minute. 256 oz in 2 gals leaves 28.6 oz short of 2 gals. pump is able to make 4 gpm so I have a constant agitation of 282.8 oz going back into tank.