Point file.pts import truncating accuracy

All,

I'm trying to import a series of points, generated externally and formatted into a .pts file.  I'm following the route of Point -> Offset Coordinate System -> Import.

I have a previous model where we've done this and the points are reported at full accuracy (7 or 8 decimal places).  However, today when I import the points the values are being truncated (or rounded) to 3 decimal places, which is enough to create visible imperfects at the scale I'm working.  If I manually edit a value with more decimal places they are truncated (or rounded) off again.

Is this related to model accuracy - which is currently absolute, 0.01 (mm) - or a config option somewhere?

Thanks!