When Coushaine writes "vocabulary" on the blackboard during the first school session he underlines "vocabulary" he makes a half curve at the end. The next shot of the blackboard the line is straight.
Other than what was noted about the blackboard, the letters of "vocabulary" keep changing.
Someone convicted of non-violent white collar crimes like money laundering and extortion would not be sent to a maximum security prison.
O'Reilly's right nipple bleeds and is examined. When Dr Nathan informs O'Reilly of the diagnosis she says the possible tumor is under his LEFT nipple.
At the end of Season 1, Schillenger had only 3 months until his parole hearing. After the riot, it took 10 months to repair MCity and he was finally coming up for the hearing. That should have been 7 months prior.