Inevitably (and consistently) once I saved my formatted files and shut down my Mac, I will discover something I needed to correct. In this case, I forgot to uncheck the "made with Vellum" statement.
First, you'd think I'd learn to stop shutting down my Mac prior to uploading, but shutting down gives me some weird sense of satisfaction, so I continue to do so.
Second, this is not a major correction (because honestly no one cares what formatting program I used), but I do like consistency, so now I'm arguing with myself as to if I want to stay up longer to fix this. Sigh. At least the cat is still awake with me.
Final decision... Stay up longer, upload An Imperfect Engagement to all platforms, and add a surprise sale.