Starting with the song "There Are Other Ways," Odysseus says he's been away from home for 12 years when it has actually been 10 years, and this continues to be said until the song "Get in the Water," where he says it has been 10 more years.
In "Luck Runs Out," Odysseus calls Aeolus a "him," even though, throughout the rest of the saga/musical, Aeolus is depicted as female.