Alex Nguyen on "[Theme: Twenty Thirteen] Large gap between footer widgets"

This is my blog http://bitcoin.nguyenhoanghuy.com, right now it has 2 footer widgets as you can see in this picture http://imgur.com/s2xPXPL
You can see there's a large gap between 2 widgets, so when I add a third one, it goes to the bottom. Is there any way I can make the gap closer so it'll fit 3 widgets on the same row? I heard that this is hardcoded into the function masonry script, but I've not been able to fix it.