Hi @cloudmax, if you are still having any issues with this, can you please update your post with some more information so we can help you faster? Things like your read-only link, really speed things up. 
It is impossible to tell you why the negative margin in the site design is the way it is, without the read only link 
Posting guidelines can be found here: Posting Guidelines for the Design Help Category - General - Forum | Webflow
Thanks in advance!
Cheers,
Dave