AccuDraw between SS3 and SS4

I've uploaded an .alg file (with a chord defined curve), exported it to native GEOPAK, and displayed the stationing using D&C Manager.

When I used AccuDraw in SS3, the station/offset tracking from the .alg alignment was not matching the displayed stationing from the GEOPAK alignment:

However, when I opened the same file in SS4, the AccuDraw station/offset tracking matched the displayed stationing from GEOPAK:

Is there a known issue with AccuDraw between the two series?

Thanks!