Why does the mobile version look like this?

I am trying to set up WPtouch. And most of it looks good when I do a preview, but I can’t understand why there is this large white space on my homepage. Please see pic below. How can I fix this? It doesn’t look like this on my Desktop.

http://take.ms/uuHsr

https://ww.wp.xz.cn/plugins/wptouch/