I had a bit of a random interview just before Xmas. I was sent a rejection by email the next day before they interviewed other people. That was fine - I wasn't expecting to get the job.
Today I got a call from them asking me to come back for another interview as they 'may have a vacancy' due to 'timewasters, basically'. I'm intending to go whatever happens, as it's good practice. (I'm flattered, and a little bit pleased to be asked.)
Now, unless the job has changed, I'm not entirely sure why they want to see me again. If I was the wrong candidate before, why reconsider me?. Do I go in and grill them on why they want to see me again?