do i need to post data to map page first?

From what I can tell the location that the map is specified to display is not getting it's values updated when the page is submitted or the values are being reset to some default values. Whatever values are present in the wagmp_map_1.php file when the map div is drawn on the page is the location that you will see in the map.

When I view the source code after entering my zip code here is what I see for address 0

var address_0 = {
      street: '[Address]',
      city: '',
      state: '',
      zip: '',
      country: '',
      infowindow: 'default',
      infowindowtext: '<span style="font: 12px Verdana, Arial, Helvetica, sans-serif; color: black;"><strong>Service:</strong><br />(RAMONA, CA)</span>',
      full: 'RAMONA,CA',
      isdefault: true,
      addressType: 'coordinates',
      loop: '',
      latitude: '',
      longitude: '',
      markerStyle: 'Google Traditional (flat)',
      markerColor: 'Pacifica'
    };

So it seems that you are not setting the values that the map needs to show the location.

As for the service text this should be what you see in the custom info window when you create or edit the current map on the page. You can alter this text to be whatever you would like.