Fullwidth not display properly

thanks for your prompt reply!
the problem lies with another plugin called WC Marketplace, because my friends can set up their own shops on my platform with it. When I click into their shop pages on the platform, I find the display problem.

I have no idea whether such problem occurs to woocommerce even thought woocommerce is installed on the platform as well.
By the way, I learn from previous posts that some guy offers a way solving half of the problem:

#container {
clear: both;
width: 10%;
margin: auto;
background: #FFFFFF;
padding-right: 300px;
padding-left: 20px;
border: px solid #AAAAAA;
float: left;
margin-left:100px;
}

With the codes above, the situation is like this:
Input the codes into theme css: https://drive.google.com/open?id=0BxDwWuXcy7Q7YmFtcnRwU0JjYVk
then every page is ok, except the vendors shop page: https://drive.google.com/open?id=0BxDwWuXcy7Q7amxjX0xPY05jTDA
==========================
One more problem, when the front page display is swithed from ‘boxed’ into ‘full width’, it looks like this:
https://drive.google.com/open?id=0BxDwWuXcy7Q7VFNTVjFFcEFGTjQ
No margin is left to the screen edge at all.
Do you think it has something to do with the theme css?

thanks again!

@layerthemes
thanks for your reply! it’s a dummy site, which is not really online. The site runs under XAMMP simulator. Or will it work if you tell me what document to send to you for analysis? For example, the codes of the pages? Just give me a list, I try my best to prepare what you need.
Thanks again!