hi everybody

i'm quite new to concrete5, so i hope there will be a quick solution to my problem:

i have been building my site without any major problems.. except one: when i'm not logged in, e.g. when i look at the site from another browser, it shows me an old version on several pages.
i have always approved my versions. and when i'm logged in as admin, i see the right version.

recently i tried to delete old versions on a page. but it doesnt show me the right version but an empty site.

i'm confused.

thanks for your help!