About the blinking icon (Luna, Sharon):
Spoiler:That "bug" happened to me too. I'm not sure how I figured out what to do, but I think it has something to do with those paintings and objects. After checking EVERYTHING again (paintings, objects, tape information (looking to objects and paintings), the blinking icon disappeared but the strange thing is that I haven't achieved any new points before nor after the blinking icon, lol. Probably it's just an irrelevant glitch.