Coupon code loophole

I'm not exactly sure if this is a loophole or we weren't setting them up right.

We ran a few coupons over the Memorial Day weekend.
-save45: $45 off on orders between $250-$499
-save75: $75 off on orders between $500-$999
-save140: $140 off on orders between $1000-$1999
-save270: $270 off on orders $2000 and up

We added some products to the exclusion list.
-Certain brands: some per the manufacturer's request, and some because our margins are too small
-BTO packages: since we offer discounts inside the package
-Refurbished equipment: since they are heavily discounted

We had the right settings.
-Type of Discount: Price Discount (corresponding price)
-Active with an Expiration Date: (5/28/14)
-Parameters: Order Amount (250-499, 500-999, etc)
-Filter by Products: (All excluded products added), Exclude selected products checked
-Filter by Customer Type: Retail customers selected

We have had a couple orders where they were able to use the coupon and the savings "applied" to the total.

example: a customer bought a bto package ($1,399.39) and added 2 products ($69.94) outside the package (total $1469.33).  used coupon (save140) and the final total came out to 1,329.33.

Is this right?  We thought that the coupon savings would only apply to the 2 products and not the package.