Not sure if anyone else has this problem but here goes.

Some how I have ended up with a load of duplicate urls within google.

the format is as follows,

The actual page would be:
www.mysite.co.uk/category
Google had also indexed
www/mysite.co.uk/index/category

I think it might have been caused from having page not found set to redirect to home page maybe.

This causes two problems I have found

both urls above point to same content

unless content is no longer there and now, regardless of the fact I know have show 404 not found page switched on www/mysite.co.uk/index/category will redirect to my homepage. infact /index/"anything_that_doesnt_exist" will redirect to my homepage. Thus me ending up with about 100+ URLS pointing to my homepage ouch... not good

Not pointing fingers as im sure there is probably somewhere advising what settings to have the 404 set to that I didnt read.

Is this a know problem where /index/"anything_that_doesnt_exist" redirects to main page as opposed to showing 404 not found??

Beginning whats going to be a lengthy repair job with over 1000 unwanted urls on google now

Hope someone can help / advise. In the mean time I have added Disallow: /index/ in my robots.txt file..