I just received mine this week. Last month I had called them to see if I would get the spring issue since we had just joined in January. Since that call I have also received the winter 2001 issue. Give them a call.
If you call be persistent. We had a similar problem and had to keep calling. It took more than a year to recieve our magazines, but when we finally got them they sent us every issue we had missed and extended our membership for a few months.