Anyone having trouble using the Old Navy Groupon?

I haven't had trouble with any other Groupons before, so this seems to be very picky in how it is being handled. Right now Old Navy has their whole store buy 2 get 1 free. To me that is a sale plain and simple. Well, I got three items and they said you can either get the buy 2 get 1 free OR use the groupon. They claim it isn't a sale price but a promotion and you can't use two promotions. I can see them not wanting to combine the Groupon with the tanks for $2 last week where you had to print out and bring in the coupon for the discount, but I have an issue with them preventing you from getting a sale price with the Groupon. And for goodness sakes, I had like $85 worth of stuff and the Groupon saves you $10 bucks... I wound up leaving the stuff as I was too frustrated to deal with them :(

Anyone else run into issues with their Groupon?