I recently had a preliminary interview for a software position in order to find out where I might fit in a company. I performed far below my usual standard in this interview. Following the interview I was asked to come in for a second round to interviews for an entry level position at the company. I'm currently working in a senior position at another job with an offer to continue working there managing a team. I feel as though I'm past the "entry level" stage in my career, but didn't adequately demonstrate or communicate this in the preliminary interview. I'd be very happy to continue at my current job, but I'd hate to miss out on at opportunity at the new company.
It's worth noting that the recruiting company delivered an out of date résumé (2 years old) to the interviewer. I realized what had happened at the end of the meeting and gave him a new copy I had with me.
Should I suck it up and resign myself to the fact that I blew this opportunity, try and explain that I feel I'm above an entry level position or go and perform well at the interviews for the position I've been offered and try and negotiate for a higher position?
Are there any ways of communicating that I feel I should have done better in the interview? The only thing I can think of is to send some references to evidence my claim.