Continuity mistake: At the start of Kevin's party, the horse seen giving a child a ride has a small white mark on his face, between the eyes. When Cowboy Gil rides the horse he now has a long, broad white mark down his face.
Continuity mistake: When Helen throws the pictures of her daughter and her boyfriend down, the pictures are all over the floor, and by the chair she is sitting in. However, when her daughter comes in the room to pick them up, they are all in a pile closer to the coffee table.
Continuity mistake: The "lower intestines" made from balloons changes shape and color between shots.
Continuity mistake: After Todd wrecks in the drag race, Gary is running to the car and his hat falls off, but when he gets to the car, he has it on his head.
Continuity mistake: When Susan (the teacher) begins class she writes the word "bonus" on the board. When her husband comes in and starts singing, the handwriting changes in following shots.
Continuity mistake: When Tod has spoken to Gary and tells Helen he is "one messed up little dude", she sighs and her shoulders slump but the very next shot has her hands on the counter edges and she's staring straight ahead.
Continuity mistake: When Taylor is in the play she shakes her hat down, but in the next shot her hat is back on her head.
Answer: The movie is being told in a linear timeline. You have just about all the information right! I think the one thing you are letting throw you off is your assessment of the Super Bowl. You are surmising that they had just watched the game that day, but my assessment is that they are talking about the game from months ago (bearing in mind that Larry has not been around for years and has not seen his father since the last Super Bowl). My belief is the movie takes place in May. That would add up with Kevin's next year of school being 4 months away as schools usually start in September, and the math also works out with Karen's February due date. This would also explain your concern about the weather. As for Helen's baby, it is not made clear whether or not she married Mr. Bowman, nor does it really matter for timeline purposes, but they consummated the relationship not long after the first date and she got pregnant.
jshy7979