The volume identifiers specifically state that a blank line does not follow them. Examples in formats show centered headings immediately follow the volume identifier. I believe you can interpret the same logic to a cell 5 heading – so no blank line between a volume identifier and cell 5 heading.
As info – I would probably put the months in this contents in cell 1 and the information under them in cell 3 with runovers in cell 5 – it saves some space and still conveys the same message.
Cindi