When going through an article that you like and you click on the like button the ui interaction acts unpredictably. Some times the button gets highlighted but not showing the number of likes, if you press it again it shows 1 -sometimes that is- and then if you click it multiple times it cycles through, non highlighted button, highlighted button with no likes, less likes than the times you pressed it, exactly the number of times you pressed it or even more.
You would expect for the total likes to be available from all the users when you visit the site and when you click on the like button you would expect it to be incremented by one (possibly with auth to prevent duplicates and spam)
