The new type of captcha is destined to have some problems because it is new and the more you report the ones that look wrong the better it will get over time. I remember first ever time when google created their captcha (or probably bought someone elses as they usually do) and that was really weak and horrible as well, over time it became better and they created another one and that became good as well and I am sure this will become good as well.

Your responses are the true responses that is the case here, all those "highlight the traffic lights" are basically things where correct answer is the most common answer, so if we all decided to pick boxes that are incorrect, then the incorrect answer would be the acceptable answer, however we all pick the right ones and that is why it becomes the correct answer, hence why it gets better over course of years.