Snap-to Problem

I am having a problem with the Snap-To (entity) function. Whenever I
come up with a need for a circle, an want to Snap-To a tangent to
either a line or curve the Intellicad result at this point is wrong.
The Snap-to tangent function will instead snap to coordinates of
wherever the cursor was placed. Not to the nearest line.

In about 1 or ten times it will seemingly snap-to the tangent of the
line, but instead be about 1/1000th away from it. Thus not creating an
intesection, nor being tangent. I have played with the aperture opening
of the pick point, but this does not seem to alter the operation any.

Is there an adjustment for this snap-to tangent function? I cannot
locate such in the manual, only that the operation is supposed to work
like on other CAD systems.

It works without fail in Autocad, but not in Icad.

Wm.