To start the "watching" of a complete site :
there are on every page at the bottom right corner ( short over the page option buttons - look on the bottom of this page!) links which says :
"Start watching: site community.wikidot.com | category glossary | this page [?]"
click on "site community.wikidot.com " and this will add the site to your list of watched sites..
the setting of a "complete site" on your warching list "removes" all "single PAGES" of this specific site out of the watching list of pages.