Changing the Game Settings will only apply to characters created after the setting was changed, not pre-existing characters. In order to get these settings to update existing entries you to click the Apply Default Settings button in the Player Settings (inside the VTT right chat menu, settings tab, all the way at the bottom of the menu). Note that this will apply the settings to all existing characters, including PCs. So if the change is not meant for PCs you would need to manually reset the settings for them, but there should be far fewer PCs than NPCs.