Please can MYOB remove the additional row (row height is also small) that is between the column headers and the data.
"Reports in excel"
AccountRight does support the ability for you to customise the Excel templates used to export. This does require some knowledge of how Excel templates work, and I would recommend backing up the defaults before you try this.
The following help article may help
http://help.myob.com/wiki/display/ar/Microsoft+Excel+templates#expand-Salesreports