WishList Member includes settings that will either allow or prevent WishList Member from handling the Login / Logout Redirects.
These settings are located in the Advanced Options > Logins > Settings section of WishList Member.
Enabling these settings will allow WishList Member to handle the After Login and After Logout Redirects.
Disabling these settings will allow the potential for another installed plugin to handle the After Login and After Logout Redirects.