wow, two interviews - lucky you! Seriously, I've been in a similar position, did ask, but the answer was negative and I had to choose. I got the job.... (although am now looking again, as it was only a maternity cover). However, I know of a case where the school was prepared to change interview arrangements and interviewed one candidate on the next day, so I think it's worth asking, just don't expect the answer you want to get. Good luck!