DISPLAY TABLE DISCOUNTS PROBLEM

[Zama81]

Hello,
I have a problem with PrestaShop 1.5.4.1

I created three rules for discount amount in "Catalog Price Rules" associated with the value

"Nessuna personalizzazione" of the attribute "Personalizza" (image1, point 1).

I'm going on the product page and I see all the rules (image1, point 2).

 

If I select another value of the attribute "Personalizza" other than "Nessuna personalizzazione"

of point 2 of the table is empty, and this is correct.

But if I select again the value "Nessuna personalizzazione" (image2, item 1) only one rule

appears (image2, point 2).

 

How can I fix the problem?

thanks
Mark