You Really Want Me to Tell the Manager?

Yesterday at the community center where I work a few hours a month I had a patron complaint. We have an indoor walking/jogging track with three lanes. She pointed out that the older signs on the wall say that walkers should keep to the inside lanes and joggers to the outside. The new sign says that walkers should keep to the inside lane and joggers to the outside. The one sign says lanes, plural, and the other lane, singular. So she's confused about whether walkers are allowed in the middle lane or not since the signs contradict each other.