During the staff party at the beginning of the film, Mike's wife is first seen taking a picture with him and their kids. A few minutes later, they say hi and kiss as if they would meet then.
When Sarah seals an envelope for her daughter Stella and writes her daughter's name on the envelope., she does not cross the 't' in Stella's name.
There is no reason Sarah would read books from end to beginning to prepare for zero-gravity space travel.