This response to the problem turns out not to be working satisfactorily. The popup containing the listing number appears very temporarily so that before I can copy & paste it, the number disappears. Having wasted time trying to do this on a number of different listing sessions, I've had to revert to cutting & pasting from the active listings page. So, nothing improved.
Auctiva used to be an easy & fast listing tool. Progressively it's lost some of its edge over other listing alternatives.