I did some searching and found some topics on this. And as I understand it the magazine template follows the main default page width. From what I remember in my trials the magazine width remains the same even if you have no side bars or 1 etc.
Just wondering if this is something that may be addressed in the pipeline. This is one thing that will prevent me from using this theme on one of my sites at least for now.
I can't complain I use it on 2 other sites and I so hooked on it I hate to change. But I can say I'm so hesitant to purchase some of these Premium themes like from theme forest in fear that it will not have half of the capability that your theme has.