"The Broken Ear" problem (SPOILER!)
In the broken Ear episodes, something doesn't make sense.
Lopez stole the idol form the museum, made Jacob Balthazar carve a copy of it, killed him with a gas leak, and put the fake idol back in the museum.
Later, when Lopez is thrown overboard by Ramon and Alonzo, they take what they think is the real idol, but they are caught by Tintin and the ship crew. Tintin discovers the idol Lopez had was a fake as well.
Here's what I don't get: why did Lopez make Balthazar carve TWO fake idols? Why would he bring the other fake to San Theodoros? His motivation is not fully explained.