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Can I see the website I will be able to tell you then.

Thanks

From what I understand you have 2 different pages with different urls

site.com/product?#nasnsns

site.com/product?#babababa

Both these pages are different also.

And both of them have <link rel="canonical" href="http://www.site.com/producta"> rather than site.com/product?#nasnsns or the other URL.

If that is the case then yes it is wrong.

Would really depend what the actual website is going to be. Bare in mind Sitefinity isn't free so it's likely that the development company will make some cash by selling you on that system.

Personally, I would never go with it but don't know much about it. However with Wordpress you've already used it and it's constantly being updated with tonnes of new (free) features. So I would recommend you test SiteFinity out but would be sceptical about why the web development company is offering you that.

Would really depend what the actual website is going to be. Bare in mind Sitefinity isn't free so it's likely that the development company will make some cash by selling you on that system.

Personally, I would never go with it but don't know much about it. However with Wordpress you've already used it and it's constantly being updated with tonnes of new (free) features. So I would recommend you test SiteFinity out but would be sceptical about why the web development company is offering you that.