Re: Unable to view categorized pages
You might also need to grant the specific permissions for features (tiki_p_wiki_view , tiki_p_edit, etc. or whatever names they have, take the previous perm names only as orientative). Did you do so already?
It's also advisable to provide the url, if possible, so that others can have a look on what else might be wrong (the settings about category permissions seems to be right, according to what you said)