Based on what you just wrote, your older was and could be counted as a member of your household (because you were supporting kid 1 at least 51%), but not necessarily an additional student in college (because kid 1 had graduated).
Based on what you just wrote, your older was and could be counted as a member of your household (because you were supporting kid 1 at least 51%), but not necessarily an additional student in college (because kid 1 had graduated).