Sorry, Becky. I should have added that in my original message so that I didn't waste bandwidth! You are absolutely right -- or at least in agreement with Foss.
The directions indicate that the "2nd couple move up" during bars 5-6, as the 1st couple lead down the centre. (Note that Foss treats couples as two people and uses the plural.)
From: email@example.com [mailto:firstname.lastname@example.org]
Sent: Wednesday, June 02, 2004 10:26 AM
Subject: RE: How to dance John McAlpin properly
Kent - is there no "bullet-proof" description of when the second couple step up? It bothers me when they wait for bars 7 and 8, surely they need to step up on 5 and 6 as the first couple leads down, giving the first couple a space to aim for?