Headscratchers / A Close Shave

• Why didn't the Knit-O-Matic in Wallace's cellar have an emergency shutoff switch? His porridge machine had one, and a porridge machine screwing up is nothing to an automated sheep-shaving machine screwing up (as proven).
• After Gromit was arrested for sheep rustling, why did Wallace just stay at home reading about the trials in the newspaper instead of actually attending them?
  • Somebody had to stay and keep the sheep out of trouble.
  • From a budget perspective, what's cheaper - having Wallace in his living room reading a paper or building an entirely new courtroom set and even more puppets to be the jury, judge, audience, etc.? But there's no implication that he didn't go off camera either - he could easily have attended the trials during the day, then lamented over them in the evening paper (for the sake of quickly recapping it for the audience).
• At the end, why is Wendolene still walking around free after committing a crime for which Gromit received life imprisonment? Her only defence could be that Preston forced her, which is highly questionable considering that she did have some level of control over him in the opening (when she stops him from following Shaun) - and besides, is any jury really going to buy "My robot dog made me do it" as an adequate defence?
  • Well, she actually has the robot dog in question and can show it to them, so that's already a huge amount of proof.
• Obviously Gromit is framed and it would look like the sheep rustler has been caught. But then we see Preston (and Wendolene, before she actively stands up against him)... rustling sheep again, only a matter of days after Gromit was found guilty. Surely if they continued doing it immediately after the 'rustler' had been caught, it would be an obvious indicator that he wasn't the only one. Even if Preston hypothetically framed Wallace as Gromit's accomplice, there's only so long he could continue rustling without the authorities noticing.
• How does Wendoline know Shaun's name during the truck chase? She'd hardly seen Shaun before this point and Wallace definitely didn't mention him to her (at least not that we see).