somebody else on this site got called back for a second interview with their state school...and they got in almost immediately afterwards
however, i think it was because they were a repplicant, and ended up the 2nd time with the interviewer they had the year before
in any case, i would think that if they're bothering to call you back and use their interviewer's time for you, they probably really want you, and are looking for an excuse to NOT reject you, so go and rock it hard