Post Types Order

Hi Hartenheer. This is plugin territory, see WordPress plugins:

https://www.google.ru/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=change%20blog%20order%20wp%20plugin

I do not know how this works.
Do not get it right at the old post to get the first

Hartenheer, the sort order of the main query for the blog page (and maybe archives if you want it) should be changes by using ‘pre_get_posts’ hook. Some plugins can do it for you.