[xwiki-users] User rights?

Can someone please confirm that I understand user rights properly? I have a wiki in which I have loaded all of our custom pages into a space called "1". We use LDAP, so every user is automatically added to the XWikiAllGroup. We have a small team that wants to utilize secured pages, so I created a group called GroupA. I then went through and added team members to GroupA (without removing them from XWikiAllGroup). At the wiki level, I have granted both groups "view" access, but blocked everything else. At the "1" space level, I have granted both groups "edit" and "delete" rights Now, in that space, there are some pages that we only want GroupA to see. I thought it was simple - I could just go into each page, block XWikiAllGroup from view/edit/delete, and grant view/edit/delete access to GroupA. Apparently that is not true - the fact that they are still in XWikiAllGroup prevents them from viewing those pages, since that group is blocked? I expected the fact that they are part of GroupA and GroupA is authorized, they would be authorized. If that is true, what is the solution to this? What is the simplest way to secure a page from everyone except the members of GroupA? If I remove GroupA members from XWikiAllGroup, that seems to cause other issues with skins and such. Any suggestions? Thanks! - Matt L.