Many thanks for your detailed and thoutful response.
I have checked all your suggestions: One tap per project and I do have 3 separate sequences in the project. However, there is no indication that I can see where the files for those sequences reside.
A bottom line questions: Although I hate to be blind when it comes to where these files are, at the end of the day so long as I can open, close and reopen a project and all my edits are still there is there any reason to worry? (Believe me, I do want to know where these critters are, but…).
John