[cflsystems]

This bug still exists in 4.6.0 - I first spotted it in 4.4.x...

In skin/common_files/modules/Advanced_Order_Management/edit_customer.tpl

{if $address_fields.phone.avail eq 'Y'}
<tr{cycle name=c4 values=', class="TableSubHead"'}>
  <td>{$lng.lbl_phone}</td>
  <td><input type="text" name="customer_info[b_phone]" size="32" maxlength="32" value="{$cart_customer.b_phone|escape}" /></td>
  <td>{$customer.s_phone}</td>
</tr>
{/if}
{if $address_fields.fax.avail eq 'Y'}
<tr{cycle name=c4 values=', class="TableSubHead"'}>
  <td>{$lng.lbl_fax}</td>
  <td><input type="text" name="customer_info[b_fax]" size="32" maxlength="32" value="{$cart_customer.b_fax|escape}" /></td>
  <td>{$customer.s_fax}</td>
</tr>
{/if}

Should be b_phone and b_fax

  <select name="customer_info[s_country]" id="customer_info_s_country" onchange="javascript: check_zip_code_field(this.form['customer_info[s_country]'], this.form['customer_info[s_zipcode]']);">
  {section name=country_idx loop=$countries}
    <option value="{$countries[country_idx].country_code|escape}"{if $cart_customer.s_country eq $countries[country_idx].country_code or ($countries[country_idx].country_code eq $config.General.default_country and $cart_customer.b_country eq "")} selected="selected"{/if}>{$countries[country_idx].country}</option>
  {/section}
  </select>

Should be s_country