Problem: multi-bar rests in SATB score

[mark damerell]

Lilypond version 2.10.33: to see my problem, take the SATB template
from Appendix D4.1 and insert

        \set Score.skipBars = ##t

at the start of the \global  section and insert

R1*7

in front of each voice's notes.

Instead of a 7 bar rest, I get a 1 bar rest followed by  a 6 bar rest, and these
rests are printed twice in each staff, once for Sopranos and once for Altos.

Please any advice? thank you