Magazines, Anyone?

Last month, I unexpectedly received a free copy of Lucky magazine. Whoo hoo. I hadn't subscribed to the magazine, but I was more than happy to receive it. I looked at the label, and it showed that I had a subscription until next year.

All was well and good until I got the mail today. The next copy of Lucky was there (yippee), as well as a copy of Working Mother. ????????? Which also came with a one year subscription. Who on earth sent me that?