[Plugin: yith wishlist] Several problems

Hi all,
I got the yith wishlist together with my theme (themeforest magnium) and now try to use it but runs into a lot of strange problems.
1 – It works to add products to the wish list and the text changes to “browse wishlist”. But after reloading the page it’s back to “add to wishlist”. But if you look in the wishlist the product is already there. Tried to empty the cache and start over doesn’t help. Some caching problem I fail to see?
2 – when clicking on the “browse wishlist” on the product page the link is showing some strange “?attachment_id=3316” and lands on a page not showing anything useful. Tried to generate my permalinks doesn’t help. What permalinks are needed to be changed and to what? Or is it something else needed to be changed?
3 – tries to get rid of the hart symbol. Found some css that yith helped somebody else with but it only affect the “add to wishlist” section not the other places it’s showed. Any ideas how to get rid of it or change it for a book or notice-symbol?
Any help appreciated. I’m not too good at css and sample good helps a lot if you have any ideas.
Site under development is password protected but I gladly send log in private messages.