looking at lines 204 -209:
</form>
</div>
<div style="width:86px; float:left; #00ff00">
<input type="hidden" name="cocolynnshoppingcart_1_ID_Add" value="<?php echo $row_Products["ProductID"]; ?>" />
<input type="text" name="cocolynnshoppingcart_1_Quantity_Add" value="1" size="4" />
your ID and quantity elements have been moved outside of the form. change that to:
<input type="hidden" name="cocolynnshoppingcart_1_ID_Add" value="<?php echo $row_Products["ProductID"]; ?>" />
<input type="text" name="cocolynnshoppingcart_1_Quantity_Add" value="1" size="4" />
</form>
</div>
<div style="width:86px; float:left; #00ff00">