The reason for this is if you have a W4N user whose role is mapped to a Smarts Profile then they are able to see all operations when they right click on any notification.
However when that same user adds an additional role that has a smarts profile mapped to it then the 4 operations mentioned will not be displayed.
The reason for this is in Smarts there is only one profile mapped per user.
However in W4N, through roles, you can have multiple SAM profiles for a single user.
Therefore the idea is to have SAM and W4N behave the same way - one user, one profile.
Hence the limited operations when additional Roles with Smarts Profile's mapped are added to a W4N user.