Coupon Code Applies to One Product Instead of Whole Cart – Magento Fix

You can import same list of coupon codes into each rule.

Do not forget to remove unique index from the table salesrule_coupon per another question in your post.

Then each coupon code will trigger both rules, and one will match.

In the class Mage_SalesRule_Model_Quote_Discount there is this method that adds the discount total to the list of totals:

public function fetch(Mage_Sales_Model_Quote_Address $address)
{
    $amount = $address->getDiscountAmount();

    if ($amount!=0) {
        $description = $address->getDiscountDescription();
        if (strlen($description)) {
            $title = Mage::helper('sales')->__('Discount (%s)', $description);
        } else {
            $title = Mage::helper('sales')->__('Discount');
        }
        $address->addTotal(array(
            'code'  => $this->getCode(),
            'title' => $title,
            'value' => $amount
        ));
    }
    return $this;
}

You can see here that the total is added only when the discount amount is not zero if ($amount!=0) {.
So just rewrite this class and change the method I mentioned. Remove the if statement and it should work.