Double Custom metrics for Windows Instances

[RonaldoNazo]

Describe the bug
I am trying to install and run CloudWatch agent into some Windows EC2 instances, and Configuring to pull : "% Free Space" on "C:" ,and "% Committed Bytes In Use" . And I want only "aggregation_dimensions": [ [ "InstanceId" ] ]" .But The configuration Creates 4-Custom metrics, and not 2.

Steps to reproduce

I use Run commands with this configuration: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/download-CloudWatch-Agent-on-EC2-Instance-SSM-first.html#install-CloudWatch-Agent-EC2-first

I install the cw agent and also configure this configuration from a parameter store.

What did you expect to see?
I want to see 2 metrics into the namespace of /AWS/EC2/AGENT ,and into dimension "InstanceId" .

What did you see instead?
I see 4 metrics into the namespace /AWS/EC2/AGENT , mem_used_percent and disk_free_percent into dimension InstanceId, 1 into dimension "InstanceId, objectname" for mem_used_percent , and 1 into dimension "InstanceId, instance, objectname" for "disk_free_percent".

What version did you use?
Version: CWAgent/1.300044.0b793 (go1.22.6; windows; amd64)

What config did you use?
Config:

{
  "metrics": {
    "namespace": "AWS/EC2/AGENT",
    "aggregation_dimensions": [
      [
        "InstanceId"
      ]
    ],
    "append_dimensions": {
      "InstanceId": "${aws:InstanceId}"
    },
    "metrics_collected": {
      "LogicalDisk": {
        "drop_device": true,
        "drop_original_metrics": true,
        "aggregation_dimensions": [
          [
            "InstanceId"
          ]
        ],
        "measurement": [
          {
            "name": "% Free Space", "rename": "disk_free_percent"
          }
        ],
        "metrics_collection_interval": 10,
        "resources": [
          "C:"
        ]
      },
      "Memory": {
        "drop_original_metrics": true,
        "aggregation_dimensions": [
          [
            "InstanceId"
          ]
        ],
        "measurement": [
          {
            "name": "% Committed Bytes In Use", "rename": "mem_used_percent"
          }
        ],
        "metrics_collection_interval": 10
      }
    }
  }
}

Environment
OS:

OS Name:                   Microsoft Windows Server 2022 Datacenter
OS Version:                10.0.20348 N/A Build 20348
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Server
OS Build Type:             Multiprocessor Free
Registered Owner:          EC2
Registered Organization:   Amazon.com

Additional context
I don't want to cause double costs because of this cloudwatch agent misconfiguration .