Indeed, you probably got mixed up when setting LPA and RPA points when import the BrainSuite folder in Brainstorm.
Delete your subject, import again the anatomy and make sure you select correctly the LPA point on the side that shows the “L” label. Change the orientation option in the MRI viewer to work in the convention you are the most familiar with (neurological=left hemisphere on the left of the image / radiological=left hemisphere on the right of the image)