I create a table using lines (LineCurve) and then add text entities with MiddleCentre justification, and then pass all the geomtery together to create an instance object and place it in the layout view.
Rhino.Geometry.TextEntity te = new Rhino.Geometry.TextEntity();
te.Justification = TextJustification.MiddleCenter;
This is what I get in WIP:
This is how it is in working V5:
It is seen that the text is not in middle and center of the cell.
Also using doc.Objects.AddText with txtObj.TextGeometry.Justification = TextJustification.MiddleCenter; does not work.