1) It looks that full-width layout for the product was enabled. Check now.
2) You can enable the Responsive module for the boxed model http://prntscr.com/sgx3vv and change the margins/paddings depending on the device. Also, you can use the column Responsive options and manage columns width for different devices http://prntscr.com/sgx59a
Everything depends on the results you want to achieve for the smaller devices.
