The problem is that you cannot unhide hidden columns in OOo calc, in sheet 2 or sheet 3 (sheet 1 works okay). Oddly, unmodified OOo v1.1.2 seems to not have this problem.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=137307
-- -**-*-*---*-*---*-*---*-----*-*-----*---*-*---*-----*-----*-*-----*--- Jon Lapham <lapham@xxxxxxxxx> Rio de Janeiro, Brasil Personal: http://www.jandr.org/ ***-*--*----*-------*------------*--------------------*---------------