In Steve and Janet's room, Steve's old license plate is hanging on the wall. But the number on it is wrong: It reads I2A4RE. The real license plate was I8A4RE. (I ate a Ferrari).
This is not true. The light reflecting off the license plate makes the 8 look like a 2 at certain points, but once the camera moves, the license plate actually does say I8A4RE.
When Donna tells Gina that John Martin is also her father she states that Frank Kincaid was her dad. When Donna shows her the birth certificate it shows her mother as Bobbi Gina Kincaid (and the certificate says to put your maiden name). Gina's mother name shouldn't be Kincaid on the birth certificate because that's her married name.