I am having the following issue while building my site: I try to make a portfolio page with several images that will link each to the corresponding project page. I've created all the pages but, when I do the linking, some of the thumbnails in the portfolio page refer to other pages, pages that are not correct and I can not seem to access trough the "manage pages" options. It seems like they link to hidden pages and there's no way I can change that. Actually, if I go to SEO/sitemap, these hidden pages appear there as duplicates along others I've created (the right ones). However, while I can access and edit the good ones, I can only link to the wrong pages in some cases. Could anyone help me with this issue?

Thanks in advance

Dani