Thanks for the advice. I don't think she's overweight (she's the same girth/size as my breeding females that had big healthy clutches), but I will back down her feeding schedule anyway. I mean it can't hurt at this point.
I moved from North Carolina to Texas this summer (temps have actually been about the same this summer), and my room-mate kept all my snakes until I had gotten settled. The way everything lines up she would have ovulated before she was shipped to me. But, I guess it still could have thrown off her cycle that she changed racks.
Thanks again.