Please look at the attached. When the learner goes to slide 1.2 they click on a box and visit slides 1.3, 1.4 or 1.6. The next button takes them back to 1.2. Once all three slides (1.3, 1.4 and 1.6) are visited, the next button on 1.2 should appear and the learner should go to slide 1.5. What am I doing wrong?