It was Columbus' second win in its past three matches.
Anor put the game away in the 77th minute on a goal off a rebound of his own shot. He got a pass from Tommy Heinemann on the left box, but his shot for the far post was saved by Houston's Tally Hall.
Hall couldn't control the ball, and it bounced back to Anor. He shot it into the upper right corner, just inside the far post to make it 2-0.
Andres Mendoza gave Columbus (5-4-6) a 1-0 lead in the 41st minute. Mendoza got a forwarding pass from Anor, had a short breakaway and nailed a shot inside the near post.
The Dynamo (4-6-6) had two chances to score in the 60th minute, but a Will Bruin breakaway shot from the left box was batted out by Columbus goalkeeper William Hesmer.