Additional information
I have discovered that the field is being truncated due to a query:
SELECT DISTINCT tblCharges.CHGATTY, tblCharges.RESPATTY, tblCharges.CLNTNO, tblCharges.FILENO, tblCharges.DATE, tblCharges.RecordNumber, tblCharges.CHARGE, tblCharges.UNITS, tblCharges.RATE...