1 option name with 2 option values showing twice in store

Hello,

When I use 1 options name with 2 options value's the product is showing twice in the store.

Just like rope in this example:
http://www.dezinashop.com/demo/index.php?main_page=advanced_search_result&search_in_description=1&keyword=rope&sort=20a&alpha_filter_id=82

It is the same product when you click on one of them.

How to prevent 1 product with 2 options values showing up twice in the store? This way i'm getting every product twice.

Many thanks!

Since those products have different product ids (154 and 165), I would guess you created it twice.

Thanks for the reply Stevesh, but i didnt create 2 products.

I created 1 option name and 2 options values as describe here:
https://www.zen-cart.com/tutorials/index.php?article=71
Near the bottom at "Another way of looking at it"

Then i added to 1 product via atribute controller.
It works ok, i have 1 product with 2 options in the product screen.
But the product is showing twice in the categories

OK, I now know it is because of the music add on were using.

The add on has an extra attribute. When using the attribute
it is showing the product.
I also find out that if we using the deault "default_filter.php" it is working because it ignores the extra attribute.

How can we prevent the product shwoing up twice when using the add on attribute?

Any hint would be much appreciated!