Booking 1st and 2nd Interviews at the same time

Hi

We have a 2 stage interview, and the dates are known.

I have booked candidates on a 1st interview, but don't seem able to book again to enter in a date for the 2nd Interview.

Is this at all possible, as would be handy to not have to wait until 1st interview has ended.

This is old view.

Thanks