Modify submenue position

Hi!
I am currently workning on a site that is not online yet. I am using the latest versions of Joomla (3.5.1) and the magazine template (3.20.1). I have one main menue on the lefthand side. Since some menue points contain more characters than in the demo-magazine I modified the width of the menue to 17% in the template settings.
Unfortunately the submenu pops up in the same position as before, covering part of the main menue. I would like to move the submenu further to the right but all my attempts with css overrides did not work. When I inspect the site I can see that the div (class="childcontent active") get a hardcoded style left: auto.
Do you have any suggestions wheter there are other elements I could move to get the wanted effect?
Why is left:auto hardcoded at all? As far as I know auto is the default value.

Thanks for your help in advance!
Niels

submenue.jpg

Hi

I'm afraid I will need to see it live to test with firebug to help. Please ignore it for now and get back to me when site will be online.