Can't update quantity of stock PrestaShop 1.5.4.1

[urwis]

Hi guys,

 

I having some weird kind of issue with my Prestashop 1.5.4.1 inventory stock quantity update. 

 

It goes like this-  count of available products in back office category list  is different form when actually entering product card or on front office of store - please see images.

 

For example if one looks in categorie list store shows that its 5 bags available but when entering same product quantity shows 85 and same 85 is on front office. This is product with no combinations. 

 

If I wanna change item count to lets say 3 following things would accrue - in category list count would show 3 but product card and front office would say that quantity is 83. For whatever reason prestashop thinks it 80 more in particular example. 

 

Now I am not able to edit my inventory any more because Presta would make its own quantities.

 

What could be problem? 

 

link to store if it helps -  boniz.eu

 

I been browsing forums for a day now - havent found anything similar to my issue.

 

please help