operatorhub is showing 400+ operators which are not listed in imageset config file

Issue

• The image mirroring has been done for a single operator but still operatorhub shows all operators.
• oc-mirror list operators command shows operators that are not listed in imageset config file.

$ cat imageset-config.yaml
kind: ImageSetConfiguration
apiVersion: mirror.openshift.io/v1alpha2
storageConfig:
  registry:
    imageURL: my-mirror-registry/oc-mirror
    skipTLS: false
mirror:
  operators:
  - catalog: registry.redhat.io/redhat/redhat-operator-index:v4.14
    packages:
      - name: metallb-operator
______________________________

$ oc-mirror list operators --catalog my-mirror-registry/oc-mirror/redhat/redhat-operator-index:v4.14
NAME                                          DISPLAY NAME                                             DEFAULT CHANNEL
3scale-operator                               Red Hat Integration - 3scale                             threescale-2.14
advanced-cluster-management                   Advanced Cluster Management for Kubernetes               release-2.10
amq-broker-rhel8                              Red Hat Integration - AMQ Broker for RHEL 8 (Multiarch)  7.12.x
amq-online                                    Red Hat Integration - AMQ Online                         stable
amq-streams                                   Red Hat Streams for Apache Kafka                         stable
[...]