I tried letting the logomatic run in the analog mode at various frequencies and did find that for Frequencies <10 a leading zero must be used.
Next, with nothing connected to the ADC pads, I let the Logomatic run long enough for about 65,000 lines of values to be written. Then I averaged the logged values and that result came out to:
Average of AD1.3 = 545.7590143
Average of AD0.3 = 577.1797818
Average of AD0.2 = 505.1089647
Average of AD0.1 = 508.3867552
Average of AD1.2 = 641.2651102
Average of AD0.4 = 761.6829328
Average of AD1.7 = 207.3474174
Average of AD1.6 = 235.1309377
I repeated this procedure several times and the results were roughly the same.
I do realize that the open pads are measuring the random, stray voltage in the air, but why is the averaged value AD0.4 significantly higher, and why are the values of AD1.7 and AD1.6 significantly lower?