SEF Problem with Category Menu Items

-- url of the page with the problem -- : www.baycitycargo.com
-- HikaShop version -- : 2.3.0
-- Joomla version -- : 3.2.3
-- PHP version -- : 5.3.28
-- Browser(s) name and version -- : Firefox 27.0.1
-- Error-message(debug-mod must be tuned on) -- : None

We have created menu items to Hikashop categories, and when SEF is disabled, they work properly
index.php?option=com_hikashop&view=category&layout=listing&Itemid=192 goes to License Plate Letters just as it should
index.php?option=com_hikashop&view=category&layout=listing&Itemid=172 goes to Vintage Letters just as it should
etc etc

BUT...

When SEF is enabled on the site, then ALL of the Menu Items that are pointing to categories go to just
www.baycitycargo.com/vintage-letters/category

How can we prevent this so that Vintage Letters goes to www.baycitycargo.com/vintage-letters/category while License Plate Letters goes to www.baycitycargo.com/license-plate-letters/category etc etc?

Never mind. Someone had installed AceSEF in the system and the problem was there. When removed, the SEF URL's now work properly using Joomla's default SEF routing.