Other mistake: Justin reads the online article about what happened one year earlier on October 25th, which, as mentioned during the testimony and in line with the movie current events taking place in 2022, was Monday, Oct 25, 2021. However, he then checks his online calendar, which has a note for the due date of the twins (his wife's earlier miscarriage that indirectly caused the accident). But the note is on a "T" day - Tuesday, Oct 25, 2022. He looks up a 2021 note in a 2022 calendar... and he finds it. It should also be noted that you can see in the browser window by the calendar that the online article he was checking out earlier now wrongly says that they argued on the night of the 24th instead of the 25th. Clicking on the calendar entry pops then up the correct Monday 25th, 2021 date.
Other mistake: Justin is checking out an online article from one year prior. The article incorrectly says that the arguing couple parted ways "shortly after midnight," when we know that she was in fact killed at 11:46. It may seem that an online article getting something wrong is not a big deal (then again, most movie mistakes aren't), but what makes this funny is that Justin checks a few seconds later the same article, and this time the same line says "shortly before midnight." Someone realised the mistake when it was time to shoot a closer angle of the screen, and production fixed it.
