docker - create two container got two different network id instead of using default bridge network

My goal was, that Jenkins container will "talk" with Ansible container in order to create Jenkins file for Jenkins pipeline.

I was expected that those two container will "join" to bridge network and get 2 IP addresses of the same network id, but instead additional two networks were created, and each container got IP of different Network id.

Also, expected that those two container will have access to the internet.

So, In my Windows 10 I'm running Docker Desktop, I have 2 docker-compose.yml files,
One, for Jenkins container:

version: '3.7'
services:
  jenkins:
    image: jenkins/jenkins:lts
    privileged: true
    user: root
    ports:
      - 8080:8080
      - 50000:50000
    container_name: jenkins

Another, for Ansible container:

version: '2'
services:
  ansible:
    container_name: ansible
    hostname: ansible
    image: ansible
    volumes:
      - ~/product/ansible:/ansible
    working_dir: /ansible
    build:
      context: .
      dockerfile: Dockerfile
    dns:
      - 200.20.200.20

I ran the following command for each docker-compose.yml file, so I had two separate machines:

docker-compose up --build

I inspected my container's network details and found out that each container got a different Network ID, see below:

PS > docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' ansible
172.18.0.2
PS > docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' jenkins
172.19.0.2

check my docker networks section, revealed that 2 more networks were created, besides bridge, host and none:

PS > docker network ls
NETWORK ID     NAME              DRIVER    SCOPE
8cefaed24885   ansible_default   bridge    local
44bedcd1622d   bridge            bridge    local
61e1c7f7051e   host              host      local
b5a7a7a424a4   jenkins_default   bridge    local
4e5d6c77cb5a   none              null      local

Of course, inspecting bridge network shows that container key is empty:

{
    "Name": "bridge",
    "Id": "44bedcd1622d820ce4e29a5cd545f244ba2d303102f1956fe76069a63e7c220e",
    "Created": "2021-08-25T13:13:57.6577149Z",
    "Scope": "local",
    "Driver": "bridge",
    "EnableIPv6": false,
    "IPAM": {
        "Driver": "default",
        "Options": null,
        "Config": [
            {
                "Subnet": "172.17.0.0/16",
                "Gateway": "172.17.0.1"
            }
        ]
    },
    "Internal": false,
    "Attachable": false,
    "Ingress": false,
    "ConfigFrom": {
        "Network": ""
    },
    "ConfigOnly": false,
    "Containers": {},
    "Options": {
        "com.docker.network.bridge.default_bridge": "true",
        "com.docker.network.bridge.enable_icc": "true",
        "com.docker.network.bridge.enable_ip_masquerade": "true",
        "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
        "com.docker.network.bridge.name": "docker0",
        "com.docker.network.driver.mtu": "1500"
    },
    "Labels": {},
    "CreatedTime": 1629897237657
}

My question are:
a) Why two more docker networks were created when I ran docker-compose up --build command?
b) How can I make those containers working with bridge network and get IPs of the same network id (the bridge network id 172.17.x.x) in order that they'll talk each other?