Just a followup note - based on your experience and splitting my bank accounts up - I checked on my other credit cards this am and found out someone has been using my Master card on that shopping channel and WalMart online to the tune of nearly $2000. I rarely use this card and never to either of those places.
If I had not read your experience - would not have gotten taken the precautions. See what ripples you make? :o)
I am glad you looked into it. File a police report, even if not for these instances, but for future proof.