SEO, URI's and routing.... Best practices?

[eluser]Dandy_andy[/eluser]
Firstly, I have to say how amazing I am finding Codeigniter having used it for only a couple of months. It has made my life so much easier. Anyway, on to my question. My question is more related to SEO really but ties in with Codeigniter. I have a site where the homepage is:-

www.sitename.com/home/page/search

Basically, I want all new visitors and search engines to find my homepage at:-

www.sitename.com

So I have set a my default route to the above and all is fine. However, I have been reading that rankings are affected by multiple routes to the same page. Foe example, using the re-route method, anyone can get to the home page through either of the options above. Will this impact my SER?

Does anyone have any SEO experience with this and can anyone recommend the best practice for the codeigniter URI structure?

Thanks in advance.