liferay 6.2 order of files loading

Loading jar:file:/C:/liferay6.2world/liferay-portal-6.2-ce-ga2/tomcat-7.0.42/web
apps/ROOT/WEB-INF/lib/portal-impl.jar!/system.properties

Loading jar:file:/C:/liferay6.2world/liferay-portal-6.2-ce-ga2/tomcat-7.0.42/web
apps/ROOT/WEB-INF/lib/portal-impl.jar!/portal.properties


Loading file:/C:/liferay6.2world/liferay-portal-6.2-ce-ga2/portal-ext.properties