If you go to vote - on the right-hand side, or view "results" - the poll shows up on a new URL but the toputility-a is still visible, even though utility-a is only set to the home page. This does that same for other things also.
This is actually normal Joomla behavior. For pages that doesn't have assigned itemid (every page dynamically generated which doesn't have menu item defined) Joomla will show modules assigned to the default itemid (which is usually Home page of the site)