Mobile Responsive is Incorrect Due to Missing min-width

Hello,
I am trying to launch a website (http://everettkelley.com/drupal/) today but encountering some bugs with the responsive for mobile. I am using a Fusion Starter Lite subtheme and the responsive elements work perfectly on my desktop, tablet and mobile emulators on the computer. However, when I look at it on a phone (iPhone or Android) the columns are not resizing to 100%. They are stacking correctly but seem to be about 300% of the screen width.

This is the default CSS in the theme for smaller screen sizes:

@media only screen and (max-width:759px) {
/**
 * Fusion Grid Layout - Mobile layout, 12 column grid, 15px gutters
 * -------------------------------------------------------------------- */

/* grid widths */
body .grid12-1,
body .grid12-2,
body .grid12-3,
body .grid12-4,
body .grid12-5,
body .grid12-6,
body .grid12-7,
body .grid12-8,
body .grid12-9,
body .grid12-10,
body .grid12-11,
body .grid12-12 {
  clear: both;
  width: 100%;
}

I also tried referencing the size more specifically with this code, which caused no change:

@media only screen and (max-device-width: 568px) and (orientation:landscape), 
only screen and (min-width:320px) and (max-width:568px) and (min-device-width: 320px) 
/**
 * Fusion Grid Layout - Mobile layout, 12 column grid, 15px gutters
 * -------------------------------------------------------------------- */

/* grid widths */
body .grid12-1,
body .grid12-2,
body .grid12-3,
body .grid12-4,
body .grid12-5,
body .grid12-6,
body .grid12-7,
body .grid12-8,
body .grid12-9,
body .grid12-10,
body .grid12-11,
body .grid12-12,
#main-wrapper {
  clear: both;
  width: 100%;
  max-width: 320px !important;
}

This is very difficult for me to troubleshoot because the responsive works fine on the computer and resizing emulators on the computer, but does not actually work on the phones. If anyone has had similar problems and can offer some insight, I would really appreciate it. As I said I am trying to launch this site today, so please reply as soon as possible!

Thanks in advance!

Lauren