You have to see the buttons as a pile of buttons, i.e you take from the bottom and the rest collapse. This is why if you have 3 events and not 5, they are listed with 2 empty spaces and 3 buttons, and not 3 buttons and 2 empty spaces, if you follow me.
Hofstadter's Law: "It always takes longer than you expect, even when you take into account Hofstadter's law."