Deliberate "mistake": When Tiffany calls Ruth Bailey, you can see that the mobile phone she uses is turned off.

Factual error: Joan should have still heard Jennifer screaming when Tiffany hung up on her extension, The line would not have been disconnected because Jennifer's extension was still off the hook.

Audio problem: When Glen/Glenda is in the baby cradle, the words do not match the lips when he/she says, "We can finally be a real family."