Export / import, select on user permissions, it won't take proper effect. See source code fix for more info.
1. In portal-ext.properties set the following algorithm between to 1-4:
2. Add any portlet to pages
3. Configure guest not to have view permissions
4. Export pages with [Permissions] checked
5. Import pages with [Permissions] checked
6. Confirm in the imported pages, that the guest view is still removed from guest