Getting error using "GROUP BY WITH ROLLUP" and "ORDER BY" - sql

Question

I could use your help on this. I am running a stored procedure in SQL Server 2008 R2 where I import data into an Excel worksheet.
I am able to import the information I need just fine except for the order of the output.
This is what I get:
1 - OUTCO
10 - OUT
11 - MATCH
12 - UNRSL
2 - INCO
3 - UNDEL
4 - MAIL
5 - NOTSU
6 - NOMSI
7 - RSRCH
9 - IN
9 - INCOM
I would like to display it with the proper numeric order.
1,2,3,4,5,6,7,9,9,10,11,12.
Here is the code:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [Temp].[dmv_import]
#date DATE = NULL,
#import_type VARCHAR(5) = NULL
AS
BEGIN
SET NOCOUNT ON;
DECLARE #date_work DATE
IF #date IS NULL
SET #date_work = GETDATE()
ELSE
SET #date_work = #date
SELECT
CASE
WHEN CONVERT(VARCHAR(8), import_code) + ' - ' + vi.import_reason IS NULL
THEN 'TOTAL'
ELSE CONVERT(VARCHAR(8), import_code) + ' - ' + vi.import_reason
END AS 'Category',
SUM(CASE WHEN CONVERT(DATE, vi.createdate, 101) = #date_work THEN 1 ELSE 0 END) AS 'received',
SUM(CASE WHEN CONVERT(DATE, vi.processed_date, 101) = #date_work THEN 1 ELSE 0 END) AS 'processed'
FROM
DIMSNet.dbo.voter_import vi
WHERE
vi.import_type IN ('DMV', 'DUP','INET')
AND import_code < 13
GROUP BY
CONVERT(VARCHAR(8), import_code) + ' - ' +vi.import_reason WITH ROLLUP
END
I have tried a few different ORDER BY clauses, but I keep getting conversion errors.
1) ORDER BY CONVERT(INT, LEFT((vi.import_code + ' - ' + vi.import_reason), 2))
2) ORDER BY LEFT((vi.import_code + ' - ' + vi.import_reason),PATINDEX('%[-]%',(vi.import_code + ' - ' + vi.import_reason)-1), CAST(RIGHT((vi.import_code + ' - ' + vi.import_reason), LEN((vi.import_code + ' - ' + vi.import_reason)) - 2) AS INT)
3) ORDER BY (CONVERT(VARCHAR(8), import_code) + ' - ' + vi.import_reason) ASC
4) order by
case
WHEN ISNUMERIC(vi.import_code + ' - ' + vi.import_reason) = 1
THEN CAST(vi.import_code + ' - ' + vi.import_reason AS FLOAT)
WHEN ISNUMERIC(LEFT((vi.import_code + ' - ' + vi.import_reason),1)) = 0 THEN ASCII(LEFT(LOWER((vi.import_code + ' - ' + vi.import_reason)),1))
ELSE 2147483647 End
None of these has returned a properly formatted output.
Any help would be appreciated.

Answer 1

Assuming your codes are all numeric, try this:
order by cast(max(import_code) as int)
If not, you can use a case expression:
order by (case when isnumeric(max(import_code)) = 1
then max(import_code)
end)
The key here is using the aggregation function to just order by the import_code.