In the beginning of the courtroom scene, the clock on the wall goes backwards in time.
During Steve's opening statement in court, a montage and a lengthy series of shots showing the bored jury, stenographer, and judge is meant to suggest that he made an extremely lengthy statement. While the courtroom clock does eventually go forward several minutes in time at the end of the montage, it never changes in time at any point during the montage.
Neither the Rhoades nor the Bundys are sworn in before they take the stand in the courtroom. Nevertheless, the judge reminds Peggy that she is under oath and risks perjury for giving false testimony.