Hoping for a bigger Super Bowl attendance at the Cowboys Stadium in Arlington, Texas, the owner arranged for temporary sections to increase seating capacity. But some of those seats were not ready at game time. Eric Grubman, NFL executive vice president, said the problem was officials “just ran out of time” to complete infrastructure such as railings and steps, and to tighten risers. The stadium owner says that the $1.3-billion stadium was designed to fully accommodate the additional seats. Seating Solutions, the Commack, N.Y.-based contractor charged with installing the temporary seats, had no comment.