Thank you for posting the example for me to view. I now understand that following the instructions in 5/3 you want to insert a TN rather than create a tactile graphic, and then proceed with the itemized material. The transcriber's note would begin in cell 7 with runovers in cell 5. The format for a transcriber's note is [u]not[/u] based on the material which preceeds it. So to answer your question, no, the transcriber's note is not indented 7 cells from the previous line -- it begins [u]in[/u] cell 7.
I hope this clarifies things for you.