To be clear, this doesn't seem like it invalidates anything in the original experiment. The "rule-breaking" isn't referring to anything the researchers were doing. It's referring to what the participants were doing. It points out that the compliant subjects who delivered the shocks weren't always following the procedure they were given perfectly. Which is, of course, expected, since people in general don't follow ins…
Smooth shiny white walls, beakers and test tubes filled with brightly colored liquids on shiny metal tables… Science!