I am not familiar with that particular formation but it could be that there really are only 3 wideout positions and one TE position (even though it looks like a four-wide formation). If that is the case then you would need to either use a package that subs a WR for TE (if one exists) or manually put your fourth WR as the #1 TE on the depth chart whenever you want to use the formation(s) in question.