"Marcus and Stephanus make a journey."
Translation:Marcus et Stephanus iter faciunt.
Each possible correct answer must be entered into a database. When you mix the placement of the subjects and expect it to be in the database, you are expecting the developers to put those answers in as well as the other possible answers.... It is annoying when it happens--I know because I am mildly dyslexic and reverse the subjects quite often--but we shouldn't expect the developers to anticipate every variation of our mistakes.