First I don't think you need to enable SmartCache in the settings/viewcache.ini, because when you upgrade EZ your SmartCache settings will be lost. Anyway in the head of the file it is written:
#
# NOTE: It is not recommended to edit this files directly, instead # a file in override should be created for setting the
Second look inside your <b>setting/siteaccess/yoursite</b> and <b>setting/siteaccess/yoursite_admin</b>, if viewcache.ini.append.php exists in any of this folders delete it because It overrides you override. In my case it simply said "[ViewCacheSettings] SmartCacheClear=enabled" so when I edited a article no cache was cleared at all.
