Leaders have terminators on the end of them that look like ellipses. They are supposed to look like arrows. If it is copied while dragging it, it will show as an arrow. It then changes back to an ellipse when placed.
In the Dimension settings under the Text settings the user had a different height then the width. The difference between the height and width caused them to look like ellipses. Once the width was set the same they then looked as they should, as arrows.