It must be an error. Otherwise service may suffer or the stopover at South Keys will be very short for the Airport train. 

I don't understand how this part of Line 2 is even going to work anymore. According to the new tracks, any train going South from Bayview will have to wait between Mooney and Walkley until any North-bound trains from Limebank have gone through Walkley + Greenboro + South Keys + the entire length of track up to Leitrim! This is insane...

According to geoOttawa, it looks like the track layout at South Keys has changed. There is no longer a center storage track 

The NCC delivered a presentation on the western STO expansion, specifically the crossing and entry into Ottawa. They prefer the Wellington surface option however they also do support the Sparks tunnel. You can find the presentation attached below. Public Rapid Transit System Linking Gatineau West to Gatineau and Ottawa Downtowns - January 21, 2021 - Board of Directors 10.1-2021-P218-STO-presentation.pdf 2021-P218-STO-Gatineau-West-Ottawa.pdf