It wouldnt matter what they are in wordpress. They would need to be administrators with all access on the invision platform. If you dont have those permissions, you would not be able to give yourself them (otherwise granting permissions would be of little use). If you have all permissions on one and not the other, then you can go to System>Staff>Administrators and correct the appropriate account/group there.
If this has only been happening since logging in with SSO however, its likely you are simply being logged in with the wrong user. An admin on wordpress will not automatically have access on invision, unless its mapped to an account on invision with those rights