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The title tags on each page of the site should be different. If they all have " - ENA Shop" at the end, that's OK, so long as there is something before that that is descriptive of the page. I'd also consider changing "ENA Shop" to "ENA Nutritionals" since that seems like the better brand and the better keyword. I just did a crawl of your site and it seems that the majority of the pages have their own unique title. You do seem to have an issue with lots of 404 pages still being linked to, as well as lots of pages being indexed that should not be indexed, such as shopping cart pages. Run your site through a tool like Xenu (desktop), Screaming Frog (desktop), or the IM Ninjas Crawler (browser-based). They will give you a full list of pages that have broken links you need to fix, as well as tell you what pages are being indexed by Google that should be. Another good test is to do a search on google for site:enasport.com. If you see any pages listed there that don't have unique content, like shopping cart pages or "compare product" pages that will be duplicate content, you should noindex them.