Phillip's tutorial says you MUST have the original 30p audio in a separate timeline to make this work. So I think I do have the answer. Stop wasting your time and try to get the 30p original cut. That's the only way it will work.
His tutorial also says about audio:
As a result this makes the clip longer and slows the audio down which is undesirable where audio is important. At this point you’ve already created a copy of the original clip therefore preserving the original audio which we’ll relink later in Final Cut.
The key phrase is: "where audio is important." I'm very familiar with Phillip Bloom's work from his website and blog, and the short film he references has no sycned audio in it. It's just random street shots (beautifully done) cut to music.