CannaVest may have won six Cannabis Cups, but only two were won in Amsterdam, in 2013 and 2014. CannaVest was formed on Dec 22, 2012 via the acquisition of the Phytosphere assets and didn't exist in November, 2012, when the 2012 Amsterdam Cup was awarded.
When CannaVest did win in 2013 and 2014, there doesn't appear to have been second or third-place winners, which likely means that CBD Simple was the only entry.