duplicate page titles help

Hi

I am using opencart 2.0.3.1 and just ran my website through seobility.net website and it has picked up some errors and was just wondering if there is a extension to solve the issues or add something to my htaccess file?

the errors are below

Duplicate page titles

1. American Drinks - American Sweets - For Sweet Sake
https://www.forsweetsake.co.uk/
https://www.forsweetsake.co.uk/index.ph ... le_sitemap

2. Affiliate Program
https://www.forsweetsake.co.uk/affiliate-login
https://www.forsweetsake.co.uk/create-affiliate-account

3. Find Your Favorite Brand
https://www.forsweetsake.co.uk/brands
https://www.forsweetsake.co.uk/index.ph ... nufacturer

4. Contact Us
https://www.forsweetsake.co.uk/contact
https://www.forsweetsake.co.uk/index.ph ... on/contact

5. Forgot Your Password?
https://www.forsweetsake.co.uk/forgot-password
https://www.forsweetsake.co.uk/affiliat ... t-password

6. American Crisps
https://www.forsweetsake.co.uk/products/american-crisps
https://www.forsweetsake.co.uk/american-crisps

7. American Drinks
https://www.forsweetsake.co.uk/products/american-drinks
https://www.forsweetsake.co.uk/american-drinks

Duplicate Content
1. https://www.forsweetsake.co.uk/ Duplicate https://www.forsweetsake.co.uk/index.ph ... /google_si...
2. https://www.forsweetsake.co.uk/products/american-drinks Duplicate https://www.forsweetsake.co.uk/american-drinks

Thank you in advance