Check for Available Downloads... (where are they?)

My daughter has purchased several songs from iTunes using her iPhone and my iTunes account. She never synchs with her Powerbook, so I can't do a Home Share to transfer them to my own, or any of the other computers on our home network. However, according to the iTunes menu, any song bought using our iTunes account should automatically download to my computer. At least that's how I set the preferences.

But it's not working - when I go to the "Check for Available Downloads..." menu it tells me that all my purchases have been downloaded but these new songs are not in my Library. Is iTunes not recognizing that she has purchased them with the same account? (my credit card is certainly being charged using that account) So where are they? How do I get them on our other other computers - and eventually on our respective iPad and iPods?

Any thoughts, instructions or clarifications on how this works, would be appreciated.