The 2009 Rittenhouse WNBA set was a manufacturer experiment. In trying to drum up some more excitement for WNBA cards, Rittenhouse released the 2009 series as three smaller sets, each release a month after the other.
This leads to a rather odd set of checklists, which are much different from your normal set configuration. Follow these links for the rest of the set: Series 1 – Scoring Stars and Series 2 – The Rookies.