Character mistake: After Walt tries to slap the fly on the paper, he lifts his hand and the math is wrong. He has 2,103 + 9,745 = 11,928 and 6,012 + 7,287 = 13,301. But the actual sums are 11,848 and 13,299.
Continuity mistake: The amount of glass on the floor changes after Walt breaks the light. (00:07:10)
Audio problem: When Walt yells at Jesse through the lab's entrance door, the sound is very muffled, as if the door is a major insulator of sound. However, later, when Jesse yells at Walt through the same door, the sound is much clearer, and hardly muffled at all. (00:22:15 - 00:23:55)
Chosen answer: I'm not sure how far you are into the show but he does eventually come up with a way to launder it (wont spoil it for you but rest assured, when he gets a lawyer the show gets much better!) and in the final season he also comes up with a way to give his children his money without the cops or the DA knowing it came from him.
The_Iceman