For me at least, this question has answers that are not sorted by score:
Is this normal? I've tried refreshing the page a few times, but the order doesn't change...
You've selected the "Active" ordering for answers. If you want to sort by score, use the "Votes" ordering.
You change the sort order by selecting the appropriate tab, located on the line that says "X answers". The setting is sticky - it will keep the last selected sort order for all questions you browse from that point on.