somethings not right here

My car temp gauge runs 200* on highway and cooler in town (190). New water pump last year.
My coolant/ water mix(50/50) last year had a boil temp of 265* as per label. I learned to deal with 200* temps. Can't remember if water pump had 6 or 8 vanes. When i turn defrost on to attempt to lower engine temp, it isnt blowing hot. Kinda luke warm. Not sure if engine temp is evem am issue.

seems like somethin is backwards. Should run cooler on the highway unless it isn't getting the air. funny how different cars do different things. I am hoping that what I am about to do will cure this problem.