that styles evolve and don't just suddenly stop and shed all similarities to previous styles. Queen Anne preceded Chippendale, so it's natural to see pieces of furniture exhibiting characteristics of both styles. They didn't just wake up one day and say "I feeleth like a Chippendale" :-) Finally, we're the ones who have attempted to categorize and give name to certain styles, when in fact there's usually a continuum of development from one style (and period) to the next.