you are using email validation on the phone number field:
<span id="sprytextfield3">
<input type="text" id="CBTelephone" name="CBTelephone" value="" />
<span class="textfieldRequiredMsg">Enter you Telephone</span><span class="textfieldMinCharsMsg">Enter full Telephone</span></span></li>
var sprytextfield3 = new Spry.Widget.ValidationTextField("sprytextfield3", "email", {minChars:10});
validation the form will only submit if you enter an email address in the phone number field.