When I was troubleshooting my data I came across an odd parcellation error that I can not place. When looking at the reconstructed surface parcellation (freeview -f  {$subject}/surf/lh.pial:annot=aparc.annot:name=pial_aparc:visible=0 \ --viewport 3d)  I noticed that in a large proportion of my subjects the parcellated errors are not placed correctly. Moreover, the error mostly seems to apply to the right cortex and not the left. I adjusted foto's for visual information. 

Do you have any idea what could have gone wrong and how I can correct for this?

Kind regards,

Aicha