I think the bouncing is settled for me now.
I have seen a lot of forums that, keyword density is the key.
I have an ecommerce site, with category pages full of with my money keyword.
(Selling accessories for machines.)
It is necessary for the Visitors to know which accessorie is for what product (main keyword). But maybe not for Google...
So I have decided to test on a keyword, that i am ranking my inner page, right now for #6. (#2 before this shit)
Now, I have reduced the keyword density brutally and deleted from almost everywhere.
Lets the game begin... Keeping you posted