<SOLVED>
I'm truly sorry, seems like this is a problem of Joomla! or K2, not your extension.
Some links seems to pull the page's (of which the link is located) module positions when clicked rather than using it's own category's or a single item's module position, or sometimes when the page doesn't belong to any menu item it'll render all module positions assigned.
As I was using Gantry Framework, there's an option to assign this pages to a menu item. And the problem is solved!
Thanks again for a great extension!