I have created a product attribute of type "Price". I am using this attribute as a filter in the Layered Navigation.
My problem is that this custom price attribute does not follow the settings for the default price attribute under
System > Configuration > Catalog > Catalog > Layered Navigation.
I have set the Price Navigation Step Calculation field to "Automatic (equalize product counts)". I need this same setting applied to my custom price attribute (id=product_price).
How can I set my custom price attribute to display price tiers as "Automatic (equalize product counts)" instead of "Automatic (equalize price ranges)" which seems to be the default?