Hi,
When I try sort by price for example low to heigth.
First page:
The first product has a price of (59.00 - old price) 29.00* (*sale price),
the last product has a price of (59.00 - old price) 39.00* (*sale price), and it is correct,
but when i go to page two then :
the first has a price of (59.00 - old price) 29.00* (*sale price), and last has a price of (59.00 - old price) 45.00* (*sale price)
on on the third page :
the first has a price of (69.00 - old price) 29.00* (*sale price), and last has a price of (69.00 - old price) 49.00* (*sale price)
on the fourth page :
he first has a price of (69.00 - old price) 25.00* (*sale price), and last has a price of (69.00 - old price) 49.00* (*sale price)
and so on and so forth...
Hwo can i fix this? please give me some hints where to fint the solution 
(if you wanna check website: https://ottanta.pl/promocje?order=product.price.asc)
PS: v1.7.6.5