[funny_gal]

I am a new CVS customer and had a question regarding the ECB internet coupon. Me and my husband have two different CVS cards. I usually get more than 1 printouts of the same coupon to safegaurd against loss/damage of coupons. One day after I had used one of my ECB internet printout coupons for $10.00 at one of the CVS stores, I by mistake used the same coupon in another CVS store with my card and it worked . This is really strange since the coupon was already used and should ideally have been rejected at the check out counter since I had used it a few hours ago in another CVS store.
Since this is a genuine mistake, I was wondering if CVS will send me a letter or something asking me to return the $10 to them or cancelling my CVS card or something even worse . Please advise senior members if anyone else has come across the same issue and what has happened here. TIA.