Hi Shallow Blue,
Yeah, 18.Bd2 looks better. 18.Nd2 and it looks like White had e3-e4 plans.
After looking at 100's of RHP games it's often you see short term ideas. (e3-e4) being
played. It's as if the player is happy to see something, an, idea and it does not appear
to hang anything. So they go with that and move quickly onto their next game.