Sort order not respected

Tried sort order by date, desceding/ascending, it still seems the order is somhow random or hard to say what is it. But i am sure, it’s not by date. Would love to see it working as i need just date descending.

I am selecting articles only by tags,. And it should just list (in my case) 10 latest. I have feeling it is somehow random as it sometimes produces different list.