SOME CLARIFICATION:
1. I am totally brand new to Motion, and did not realize that the 29 in 9:29 referred to frames and not seconds. I therefore interpreted 9:29 to be 9.5 seconds. I also did not understand the disparity between timecode and seconds. I get it now.
2. I marked the query as “solved” at the point I received an answer from the Apple forum. I did not want to bother anyone further, but I did not see any option to delete the original Creative Cow post.
3. Thank you, Simon Ubsdell, for your kind and supportive response. It was very helpful. And even thank you, Robin Kurz, for your infinitely less gracious response. But Robin, if you want to talk about confusing and inscrutable, take a look at the ridiculous markup mash that manifests as your email.

4. For the record, I am a “she”, not a “he”.
SB