I was checking Google Maps as well as one of the City of Calgary development plans for the area, but I think you might be right and Google Maps is wrong, and the plan was not "official" and still in the proposal stage (and most likely someone pulled the baseline image from Google).

I've dug deeper, and I think it is actually the North-South street (that looks like a parking aisle) is Nina Gardens NE based on the following City of Calgary resources:
1) https://dmap.calgary.ca/?find=NINA%20GD%20NE
2) https://cityonline.calgary.ca/mapviewer
3) https://maps.calgary.ca/MyProperty/?redirect=/myproperty

I'll undo/revert this change. Thanks!

https://www.openstreetmap.org/changeset/151655713