Ignores Meta Settings in Admin Product Settings

When I set the meta settings via admin panel for a product to not include any of the other junk in the title it seems the store ignores it all and still adds all that junk in the title.

I really need to get rid of the price and site name etc in the title on all other pages.

Can any1 help explain what needs done for this to work.

Thanks

I've managed to get rid of price etc but not the site tagline.

So my product and other pages have the site tagline after the product name.

I only want the product name to display in the meta title on the product pages.

Please advise.

Thank you.