Continuity mistake: The beginning of the movie was set on Thursday, the day after Jim died, and Bridgette's face was just fine. Later in the movie, on Saturday, Bridgette was at the funeral with cuts and stitches on her face. Then, the movie goes back to Tuesday, the day before Jim died, and they show Bridgette running into the glass door and cutting her face. So if it happened on Tuesday, the first scene of the movie (Thursday) should have shown the cuts on her face.
Continuity mistake: When Linda is writing out the calendar of the order of the events each day, she writes Mon, Tues, Wed. across the top very hurriedly. The second time we see the days, when she writes "Jim alive again", the three days are written differently. The "M" in "Mon" crosses the line below the first time but not the second. The "T" in "Tues" crosses over into the "Mon" column, almost underlining the "Mon". It is much tighter the second time we see it. The "Wed" touches the right side of the column in the first but the left side in the second. Later when she pulls out the calendar again and adds the name Claire, the days of the week are written a third way. Originally the word "Cuts" didn't have an exclamation point but later it does. The word Funeral is first written at the top of the column near the word "Sat" but later it is seen much lower down the column. The phrase "Find out Jim died" is first written very small but in a latter shot it is bigger with the "F" extending into the previous column which it didn't do earlier. It is written a third way when she pulls out the calendar again to add Claire. Apparently the calendar was written at least three times.