Thanks for noticing this! I visited to investigate. It looks like they had a concrete path at normal sidewalk width, and then later they added a second section of concrete the same width right beside it to double the width (one side of the concrete looks newer and recent). So it looks like it started looking like a normal sidewalk, hence the appearance in the aerial imagery, and then later they came back and widened it to make it a multi-use path. I will update the map to what I found on the ground.