如何摆脱下拉框中的额外行？

So I have looked for this here and other places and I can't fine a solution. I am working on a page that has several drop down boxes for staff members. I have use sql to get the names from the database and it works fine, aside from one small error. I am getting an extra space between the default Select a Staff Member and the first name on the 2nd call to this (see pic).

This is the code I have for that section of the page.

    <select name='contact1' class="reqd">
       <?php 
          echo "<option value='0' class='reqd'>-- Select a Staff Member --</option>";
          do {
              echo "<option value='".$row_staff['staffID']."'>".$row_staff['Name'] . "</option>" ; 
          }while ($row_staff = mysql_fetch_assoc($staff));
       mysql_data_seek($staff, 0);
    ?>
    </select>

I am using the same sql statement for the request hence the mysql_data_seek($staff, 0);. I can't see anything that would cause it to have an extra space. If I put mysql_data_seek($staff, 1); that just skips the first person.

Any ideas on what I need to fix?

any particular reason why to use do ... while loop instead of (more common) while?

   mysql_data_seek($staff, 0);
   while ($row_staff = mysql_fetch_assoc($staff)) {
       echo "<option value='".$row_staff['staffID']."'>".$row_staff['Name'] . "</option>" ; 
   };