When printing from within a Batch record, a user specific option affects what report parameter is used for those reports:

1. In General Ledger > Tools > Options  > Records tab > Highlight Batch Reports 
2. On the right, if it's set to "Always use this parameter" click the binoculars to edit the parameter
3. Select the row for the parameter in use and click Open
4. At the bottom, adjust the orientation as needed to either portrait or landscape
5. Click Apply > Save

Note: The setting is user specific, however, the report parameters are not.