Hi, Fred. You have correctly applied margins for material displayed in main division/subdivision format. This format is given in §191 "Margins for Non-Spatial Itemized Materials" subsection b (page 195 of the Nemeth Code) which says this: "When non-spatial itemized material contains both main divisions and subdivisions to whatever depth ... i. The main division numbers or letters must begin in cell 1 and the associated material must be run over, if necessary, in cell 5; ii. Subdivision numbers or letters, regardless of depth, must begin in cell 3 and must be run over, if necessary, in cell 5; ... iv. When the special margin requirements for linked expressions do not apply, a displayed expression must begin in cell 7 and must be run over, if necessary, in cell 9.
Note that --in the braille transcription-- there should be no blank lines.