Me and a buddy were hunting in close proximity to each other. I had two walk under my stand. The second one stopped and must have caught wind cause she blew and ran off. This was at 7am. At 9am had another blow behind me. It had got wind of my buddy. Turns out it was most likely the same two deer.
So NO a spot is not ruined even for the day if a deer blows at you. Unless that is the only deer in the woods.