The original architect's drawings showed two parallel sets of tracks running side-by-side under the pedestrian overpass. It looks like the second platform has been changed into an island with passenger tracks running on either side of it.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/24854893@N00">Robert Taylor</a> from Stirling, ON, Canada
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/bobolink/6109958273/">New Belleville,ON, VIA Rail Station_5507</a>