Yeah, in The Missing Eye of David, I noticed the same thing with the Medusa's Lair "LET GO!" & the eyes not lighting up or Medusa's scream. It was a pretty good episode, just they got unlucky with a 1/2 Pendant we dont' even see.
The Gordion Knot (Alexander (the Great) &), that was my second episodes ever (first was the Helmet of Joan of Arc), so it feels special to me. Yeah, Retina picked up the 1/2 Pendant in the Shrine of the Silver Monkey, Tim moved pretty fast but got taken out, Retina moved at an average speed, she could've tried the Tomb-Shrine & Well-Shrine doors. At least Tim tried the (obviously) locked Python-Treasure door.