unable to change the admin(REST) port from 8091

Neither of the following worked, although they both said success:
CLI:
/opt/membase/bin/membase cluster-init --cluster=10.1.3.100:8091 -u Administrator -p password --cluster-init-user=Administrator --cluster-init-password=password --cluster-init-port=8080
SUCCESS: init 10.1.3.100

REST API:
curl -d username=Administrator -d password=password -d port=8080 http://Administrator:password@10.1.3.100:8091/settings/web

{"newBaseUri":"http://10.1.3.100:8080/"}

presumably the underlying problem is with the REST API not doing what it's saying