When I'm on blog settings, and want to update anything, after I hit 'Save' it is getting confused and redirects me to a wrong URL. (Despite being a pain in the neck) Most of the time changes are being saved but never when I want to customize my 'header' (adding an image to the library works but then adding it as the header doesn't).
That wrong URL that I'm talking about it actually just missing blog/ after my domain name:
E.g. It redirects to...
…when it should redirect to...