Okay, I found out it was the clock rate that sets the scale off. I had clock rate set at 160KHz, so the scale is divided by 1.6 after the multiplier. If the clock is of multiple of 10's, say 100K, then the scale can be set using the multiplier of 100000, when the clock is 160k, the multiplier needs to be 160000.
I wish the digital graph had an option to ignore the clock rate, just displays the samples/patterns like the waveform editor. Also, it would be nice the graph can display the channel mapping info on the Y-axis.