minSlides: 1; // at mobile width, the container isn't wide enough --> buggy sliding

The container has a width calculation with a 215% added cushion.  This increases that cushion, which helps this work at mobile widths (with 1 slide showing).

http://jsfiddle.net/n9cWN/1/

When more than 1 slide is showing, it seems to work fine.  Size down so that only 1 slide is showing, and you can see as the slider resets itself when you get to the last slide (the infinite loop).

I've noticed that the last slide breaks to a second row (there's not enough room in the container).  In your calculations ([jquery.bxslider.js @ line 191](https://github.com/wandoledzep/bxslider-4/blob/master/jquery.bxslider.js#L191)), you add 215% to the width.  **I'm not familiar with the geometry of this plugin, but it seems that if you bump this to 415, it seems to work fine?**