Custom Error Messages and `required_without_all` validation anomaly in Laravel 5.1

Here are the facts:

• I have a form with many fields
• For three of the fields, I only require one of them to be filled
• I have set required_without_all: in my custom form request for these three fields
• I have modified the :attribute in validation.php for my required fields
• The form fields in question are unique within my application

Here are the issues:

• When I enter a phone number in the emerg_contact_home_phone field, the other two do not display the error, which is correct.
• When I enter a phone number in the emerg_contact_work_phone field, the emerg_contact_mobile_phone displays an error.
• When I enter a phone number in the emerg_contact_mobile_phone field, both the emerg_contact_home_phone AND emerg_contact_work_phone display an error.
• When the error messages display, emerg_contact_mobile_phone doesn't display the modified attribute "Mobile Phone", it displays "emerg_contact_mobile_phone" instead.

Here is what I've tried:

• I have triple checked the spelling of the form names in all locations.
• I firmly believe the issue has to do with the emerg_contact_mobile_phone field, so I tried changing the name to something different (ie: 'mobile_phone')

Here is my code:

form.blade.php:

        <tr>
            <td class="col-md-4">
                {!! Form::label('emerg_contact_work_phone', '* Work Phone:', array('class' => 'control-label')) !!}
            </td>
            <td class="">
                {!! Form::text('emerg_contact_work_phone', null, array('class' => 'form-control')) !!}
                {!! $errors->first('emerg_contact_work_phone', '<span class="help-block">:message</span>') !!}
            </td>
        </tr>
        <tr>
            <td class="col-md-4">
                {!! Form::label('emerg_contact_home_phone', '* Home Phone:', array('class' => 'control-label')) !!}
            </td>
            <td class="">
                {!! Form::text('emerg_contact_home_phone', null, array('class' => 'form-control')) !!}
                {!! $errors->first('emerg_contact_home_phone', '<span class="help-block">:message</span>') !!}
            </td>
        </tr>
        <tr>
            <td class="col-md-4">
                {!! Form::label('emerg_contact_mobile_phone', '* Mobile Phone:', array('class' => 'control-label')) !!}
            </td>
            <td class="">
                {!! Form::text('emerg_contact_mobile_phone', null, array('class' => 'form-control')) !!}
                {!! $errors->first('emerg_contact_mobile_phone', '<span class="help-block">:message</span>') !!}
            </td>
        </tr>

validation.php:

'attributes' => [
    'givenname' => 'First Name',
    'surname' => 'Last Name',
    'email' => 'Email',
    'emerg_contact_relationship' => 'Relationship',
    'emerg_contact_givenname' => 'First Name',
    'emerg_contact_surname' => 'Last Name',
    'emerg_contact_work_phone' => 'Work Phone',
    'emerg_contact_home_phone' => 'Home Phone',
    'emerg_contact_mobile_phone' => 'Mobile Phone',
],

CustomFormRequest.php:

    public function rules()
{
    return [
        'givenname' => 'required',
        'surname' => 'required',
        'email' => 'required|email|unique:employees,email,' . $this->get('id'),
        'password' => 'required_with:is_user|min:6',
        'password_confirmation' => 'required_with:is_user|min:6|same:password',
        'aca_number' => 'unique:employees,aca_number,' . $this->get('id'),
        'license_number' => 'unique:employees,license_number,' . $this->get('id'),
        'base_location' => 'required',
        'emerg_contact_relationship' => 'required',
        'emerg_contact_givenname' => 'required',
        'emerg_contact_surname' => 'required',
        'emerg_contact_home_phone' => 'required_without_all:emerg_contact_work_phone, emerg_contact_mobile_phone',
        'emerg_contact_work_phone' => 'required_without_all:emerg_contact_home_phone, emerg_contact_mobile_phone',
        'emerg_contact_mobile_phone' => 'required_without_all:emerg_contact_home_phone, emerg_contact_work_phone',
    ];
}

via Chebli Mohamed