Zoom level

I have tried every different setting but I just cannot get the zoom right on this page – http://www.root7.com/store-locator/

Anyone got any suggestions for the settings. Below are what they are at, at the moment. Thanks in advance!

Force Load JavaScript: yes
Immediately Show Locations: yes
Number To Show Initially: 250
Radius To Search Initially: 1000
Zoom Level: 7
Zoom Adjustment: 11

http://ww.wp.xz.cn/plugins/store-locator-le/