I think you're missing the error here - all those posts should be editable by this user however as you can see all their associated links are disabled.
In an effort to try and diagnose the issue by change the associated user class to Administrator rather than the custom role of Colliers Admin and now any trying to login gets the dreaded error message attached.
Something appears to be very wrong with the user roles on this site however I can't seem to ascertain the cause?