AutoCAD Civil 3D :: Ground To Grid

We here at work have recently implemented using the survey database feature in CAD as a better way of manipulating and organizing points in our drawings.  However, we have begun to notice a few issues with how the survey database imports points (?). 

Sometimes, and I say sometimes because it is very sporratic, some drawings exhibit the issue and some do not, the points will be skewed off the linework (we are converting existing projects to the survey database).  In these situations I find that the Northing and Easting don't match the ascii file it was imported from, instead the "Grid Northing" and "Grid Easting" do.  Also, some drawings will have a slightly different Grid Northing and Grid Easting vs Northing and Easting, whereas some drawings will have the exact coordinates for both sets of fields. I believe the issue is one and same.

Our points handling goes like this, Data Collector--->TBC (where ground to grid and scaling is performed)---->exported to ascii file------>Imported to CAD.

This is very confusing and irritating at the same time, and really counterproductive to be troubleshooting why our points keep moving.  Redrawing the linework is NOT an option, we'll sooner go back to simple ascii file imports (where the problem is NOT present) then have to redo all of our work on our projects.