We try to offer the best deals possible, while also making sure all of the details are up front and easy to understand.  The deal's original terms were that the Groupon could not be used on items already on sale. At no time was there a better savings on FTD.com than on the FTD/Groupon site.  We understand that is confusing and upsetting to a number of people--especially since you expect a great deal from us every time.
To make this right, we've worked with FTD to make sure that your Groupon can now be used on any item at the sale price.  If you already purchased items that were also on sale, FTD will issue you a refund on the credit card you used with the difference that you should have saved.  Please allow 5-7 business days for this to show on your statement.
We're really sorry for how confusing this deal has been.  This resolution should now ensure that you get the maximum value for your FTD Groupon, even if you've already redeemed.  We hope this resolution is to your satisfaction.
Please let me know if I can help you further. 
Regards, 
Sharris W.
support@groupon.com