You are not really doing any selection with your formula.
To limit your records for a report you use the select expert (the icon is hand selecting a red ball).
when you open that you can get into the formula editor. here you can add a statement that will act like a "WHERE" clause in sql. It should be a boolean evaluation of each row. TRUE=include FALSE=exclude
Yours will look something like
{SORMASTER.ReqShipDate} in DATE(2013, 10, 01) to DATE(2013, 10, 15) AND {SORMASTER.OrderStatus} = "9"
If you wanted it to be predicated on the day you run the report you can do that as well. Something like
{SORMASTER.ReqShipDate} in Aged0To30Days AND {SORMASTER.OrderStatus} = "9"
If you always need it the 15th to the end of the month can you explain further the rules about that?
Edited by DBlank - 20 Nov 2013 at 8:53am