When Johnny sits and talks with Capt. Murdock in Murdock's home, directly behind the captain, stuck to the wall under a leopard's pelt, is a small photo of a seated woman. The photo is entirely unobstructed. As the scene progresses, the photo inexplicably moves several inches to the left, to where it is now half-concealed by the leopard pelt.
As Johnny and Mora arrive at the dive spot in the motor boat, a medium camera shot shows Mora suited up with dive tank and dive mask on her head. The shot then switches to a close up, but now we see Mora has no dive mask on, and in fact, we see Johnny holding both his and Mora's masks in his hands.
When Mora enters the water during the diving trip, the diving knife is strapped to her right leg. When Johnny and Mora are swimming together along the ocean floor, the knife is strapped to Mora's left leg. When Mora and Johnny arrive near the shiny object on the ocean floor, and begin digging at the reef, the knife is strapped back on Mora's right leg. The knife remains strapped on Mora's right leg until she removes it from the sheath.