Catalog price rules - prestashop 1.7.4.2

[Naturel Deluxe]

Hi, 

 

I'm getting crazy about to simple problems. 

Catalog price rules are not applied like I would love to see it.

The result should be quiet simple. 

Product A = retail price: € 86 = Sell price = € 74 ----> € 12 discount is managed by the csv import & works perfectly

On this € 67 I would do a simple EXTRA discount off 15% so the final price needs to be: € 62.90

The extra discount should only be for a few days available.

 

I did set a catalog price rule, this is also perfectly showing in the product detail page. 

 

But in diffent browser I get different results (never is catalog price rule applied): 

Google Chrome = only the first specific pricerule is applied. ( € 86 ---> € 74) 

Mozilla Firefox = strongly wrong = showing retail price : € 71.07 ---> also same discount as in chrome (€12) ---> € 59.07 when I refresh or I buy the product & I trhow this in the basket, numbers are changing to the same as in chrome.... Strongly wrong information to the potential customer! 

Edge = the same result as chrome

 

How could I manage the EXTRA 15% discount? 

& How could I manage the difference between chrome & firefox ---> settings are completely the same, all tested in private window & cleared cache ...

Edited August 23, 2018 by Naturel Deluxe (see edit history)