Need some clarification on Caesar II Soil Modeler : American Lifelines Alliance

dP = Yield Displacement Factor, Lat.
"F1" returns a formula dP = 0.04(H+D/2)

Upon calculation the answer is much higher than recommended typical entry between 0.1 and 0.15

Also,in the user's manual the formula is shown as 0.4(H+D/2) that would return a even higher number.

Has anyone encountered this and can advise the correct input?