Both can play guard too. Probably Leckey was too good to pass up in the 6th round. Plus, Stepanovich is supposedly not much of a long snapper in shotgun situations. Look for Step to be tried out at RT.
I personally like the move - I had both of these player on the top of my board for Center/OGs for fourth round on.
I'm glad we did not take any CBs through the sixth. We got better value. JMO.