Well, there you have it, Michael. It won't solve Carey's dilemma, but it explains why I selected a pline before. The White contour in the left picture IS a pline and is on a different layer, there is one other pline in another section of the drawing, all other contours shown are Aecc_Contours. In the right pic that same contour is an Aecc_Contour.
Added: INDEXCTL in both drawings is 0