Only 1 city is being listed under my profile and it happens to be the one I list as default city in my settings. If I change my default city, it will appear under my profile. This must have broken in the last day or two and I can no longer check the progress of any of my cities except for the default city.
I am accessing citystrides from a Mac and when I log in via a windows based machine, it will list all my active cities under my profile. So it appears to work on Windows but not Mac.