Its strange why you not able to see the option "Row background extends to full width", what theme you are using?
Can you please share the Layouts URL where you want to apply the above-mentioned settings?
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin and FTP) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I have set the next reply to private which means only you and I have access to it.