The sword wound on Oliver by Ra'as Al-Ghul changes its position. In The Climb (2014), it was on the right side of his chest, whereas it appears near his stomach in Left Behind (2015).
Brick blackmails a number of thugs into working for him by keeping evidence of their crimes and threatening to send it to the DA if they don't. However, the evidence is worthless at this point -- the courts would consider it tainted.