Changing location in form_alter can be a tiring job, mostly becuase the fileds are not available to the forms_alter . The most likely reason being that your module is called much after the location module is called . based on module weight in the system table.
This is another solution:

in your form_alter do something like this ..

function mymodule_profile_form_alter(&$form, &$form_state, $form_id){

//make a switch here for the specific form_id
$form['#after_build'][] = 'mymodule_profile_buildElements';

}

//then implement the module and make the necesary changes
function mymodule_profile_buildElements($element, &$form_state) {

}