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I have an ecommerce website where the category pages have various sorting and paging options which add a suffix to the URLs. My site is setup so the root category URL, domain.com/category-name, has a canonical tag pointing to domain.com/category-name/page1/price however all links, both interner & external, point to the former (i.e. domain.com/category-name). I would like to know whether all of the link juice is being passed onto the canonical tag URL? Otherwise should I change the canonical tag to point the other way? Thanks!

We have just re-designed our site and added a big drop-down navigation menu to help users get straight to the category/sub-category they are looking for, take a look at http://www.discountfiresupplies.co.uk to see what I mean. Since doing so our rankings have dropped which we've been told may be because there are now so many links on (particularly) the home page diluting the rankings of that page. We've been advised that if we hide the drop-down menus using "style='display: none'" until they are required that the search engines will ignore them which we have now done but is this correct or will they still be indexed? And if so do you have any other suggestions? Thanks, Tariq