Not being able to see reward availability when logged in due to not having enough points has been an issue for years. See:
http://www.flyertalk.com/forum/hilto...-homewood.html
http://www.flyertalk.com/forum/hilto...available.html
To pay with points and money now, iirc, requires points multiples of 1000. Maybe if you had at least 1000 it would show you those options, since you don't maybe it will only show you cash rates.