Website change log coding error

<select name="changelogExpansion" id="changelogExpansion" onchange="updateExpansion();" tabindex="-1">
<option value="">SELECT EXPANSION</option>
<option value="2">The Burning Crusade</option>
<option value="2" selected="">Wrath of the Lich King</option>
<option value="3">Cataclysm</option>
<option value="4">Mists of Pandaria</option>
</select>

On the change log website, if you choose the TBC expansion, it always show back the wlk.
As not any one in the web know about coding, I located the part of the error.
Hope that you fix it soon. Same Program Engineer here.