In real life Stacy and Drew's wedding was very private, plus Stacy didn't wear a wedding dress, she wore a white pantsuit.
Stacy and Drew's kids were born in 2003 and 2004, and Drew's kids were born years before that, yet in 2007 Stacy and Drew's kids were still babies and Drew's kids hadn't aged either.
The first time Kathleen slams the front door on Drew the inside is green. The next time she does it, the same door is white.
Drew's son wears a Marian Hossa Blackhawks jersey sometime in 2004 or 2005 despite Hossa not playing for the Blackhawks until 2009.
Drew's son Justin is shown wearing a Derrick Rose Chicago Bulls jersey following the death of his mother in 2004; Rose was not drafted by the Bulls until May 2008.
There are no palm trees in Bolingbrook. It's in the heart of the Midwest, not somewhere warm like Miami or California.
The movie continuously switches between calling the second son "Austin" and "Justin"