I have an update to the issue I was having.

Salt Levels from various sources
Aqua-rite - 2700ppm and varies a lot.
Salt Test Strips - 4200ppm
Taylor Drop Test - 4200ppm
Leslies - 3500ppm

I called Goldline today and talked to a tech. They walks me through a procedure where I turned the unit off and on, waited for the panel to click then read the voltages and instant salinity, then repeat the procedure again. The 1st time the instant salinity was 2700ppm, the 2nd time through the reading was 1600ppm. The tech said that my cell has gone bad. Apparently the unit switches polarity on the cells automatically, and should probably read the same salinity regardless of the polarity but mine isnt.... So a replacement cell (mine is still under warranty.... by 2 months) is on the way.

So hopefully this new cell will give me a better reading of the salinity which will agree with one of the "independant" levels that I have right now.