(Thou Shalt Not Kill) when Harry and Tom are talking near the lift in Thames house near the beginning, he presses the down button to call the lift but the top button lights up. The grid (where they are going) is also on a higher floor so he should not have pressed the down arrow anyway.
It is stated that Mary Kane's husband is scheduled for execution in Florida's electric chair. However, Florida adopted lethal injection has its primary means for capital punishment in 2000 and has not used the electric chair since. Again , it's done for legal reasons. If someone h with the same name or even a similar name had been in this situation there would be massive consequences. It's done on purpose. It is fiction, after all.