Changing Curve Number in hydrographs has no effect of peak flow or volume.

[kirk_barrettAHPWN]

Ran hydrographs with a curve number of 70.  Then changed it to 98.  No effect of peak flow or volume.   Changed to 40.  No effect.    As the curve number increases, both peak flow and runoff volume should increase.  Could anyone tell me what I might be doing wrong.?

[kirk_barrettAHPWN]

I found out this is a bug in hydrographs.  It happens when you have a custom storm and change the duration.  Somehow Hydrographs gets confused and generates runoff as if everything is impervious.  This is one of several bugs I have found in this program.   Another one is the elevation in a reservoir is not correctly graphed when the water level is below the lowest outlet. Any else noticed these bugs?