When highlighting objects in mged to go into solid edit mode it is possible to egt into a state where mged will highlight multiple objects at the same time. It isn't clear if this is just a matter of too many objects on the screen or not.
When using the faceplate (f7 + f8) the text display shows the right thing (a single object). However the graphic display is not right.
I was able to reproduce this when I selected a ARB8 object to edit the text display showed ARB8 but the graphics display showed ARB6 in the faceplate