SAGE Nominal Ledger Download - Balances don't agree to ledger on screen

Evening

I have downloaded to excel a nominal ledger (around 450 lines). Once the download has been completed and the information is on a spreadsheet, I have totalled the Debit and Credit columns and the totoals do not agree to figures on the screen.

I have deleted the "cancelled" and "deleted" transactions and the credit column now agrees, but the debit column has a difference of £50k between spreadsheet and nominal ledger in sage.

Has anyone else had this problem and how was it resolved.? I did phone SAGE for help but after 50 minutes the consultant told me I would have to tick back to between the download and the ledger on screen to find the difference which is completely unsatisfactory.

TIA 

Jason