I am able to do this now. There's some checkbox you have to check when looking at the available powers. It's called something cryptic and uninformative like "Show Additional Options", and it's very small, but it's there, just above the power list. If you check it you'll see lower level powers as an option.
No. I feel sorry for people like my friend who went to use it and it errored out on him multiple times. He is still paying for it, so he is basically getting screwed at times. It's cool that it is working for you. It's not always working for everyone else (it works for my friend fine sometimes, other times, not so well).