I dont know bout others CMS.. but for those two CMS for PHP, they have cache need to cleared in order for changes to take effect..
xoops template/layout not changed after make changes.
symphony library path not change after make changes.
For Xoops - locate folder name > [ur_xoops_folder]\xoops_data\caches\smarty_compile - delete all file inside this folder
For symphony - locate file > [ur_symphony_folder]\cache\project_autoload.cache - open with notepad, empty all data then save.