GD Search Bottom not sizing correctly

Not sure if this is a bug but… Need help.

I want to add a listing map to the bottom section of the GD Search page. I have added this using the widget page and it displays with correct data. But it is not sizing correctly. I have it set for 100% which presumably should size to the available frame (i.e. the page minus menus, margins, etc) but instead it is running to the left edge of the browser. Note that if I take this same widget setting and place it in the BD Search Top Section it correctly sizes within the GD frame Top. So it seems like a problem with GD Search Bottom is not sizing correctly.

See attached screens showing my Search page settings, identical widget settings, and top and bottom of resulting page with Top correct but Bottom under-running menu to the left. Here’s a link to the page on live site hidden page. Thanks for your advice.

https://www.myharbors.com/?geodir_search=1&stype=gd_club&s=+&snear=&set_location_type=3&set_location_val=10&sgd_clubcategory%5B%5D=&sort_by=&sgeo_lat=&sgeo_lon=