double title products page and permanent subtitle

hi, i have 3 difficulties: 1.i can't delete both the blog’s subtitle (that is “you see most people that visit your blog post usually leave without reading it all the way through”) and the subtitle of product page (that is /italian/“ qui è da dove puoi aggiungere nuovi prodotti al tuo negozio”). 2.Then I have a double title in my product category and I can’t remove almost one. 3.Finally i don’t understand how i can set in a correct way buttons of movements inside my site thanks! Marco