Was contacted for interview with Walmart, but expressed interest in wrong position...?

Go to the interview, and sometimes the person that gives the phone interview will not give the in person interview for wal-mart jobs, also there are usually lots of people who will interview for any given position at wal-mart, and they will ask you again which position are you applying for, so tell them then that you would prefer electronic position. If it is the same person, then just mention it again in there interview that "after some thought, i feel my skills would be best used in the electronics department". I would not call them now.