Factual error: It would be impossible for Malcolm to fall on the pins because the pinsetter is above them.
Continuity mistake: In the bowling alley, the design above the pins is blue and pink pins. While in the back of the bowling alley, above the pins is a different design.
Continuity mistake: In the side of the story when Lois takes the boys, Malcolm has some kiddy bumpers put in to help him bowl. In the next scene when Reese is about to tell Beth the joke, you can see the lane which Malcolm was just at but there are no bumpers in the gutters. Then later when Malcolm stands up to Lois they are back in the gutters.
Answer: Francis is only allowed to talk on the phone at school for three minutes a day. I think the code gives him free access to talk to his girlfriend.