[Zope] Odd results of '../index_html' in Zope2(cvs)

Ok, trying to make a 'move up one level' link, to allow the user to move back up the url tree one level. Thus, if user is in "/Members/ucntcme/Projects" and click on the link, they should be looking at "/Members/ucntcme/index_html" page. Unfortunately, it seems to be going up *two* levels, and seeing "/Members/index_html". Any ideas on why? Bill