Two outlets in one tile no longer works
<!-- Provide a general summary in the Title above -->

### Expected Behavior
I've been using this plugin for a while and it's been great! When I first set it up, it allowed me to combine the two outlets in my KP400 into one tile that, when tapped, shows switches for the two separate plugs.

### Current Behavior
Then I had a glitch with my server and I reinstalled the plugin. Now I have two tiles, one for each plug, and no way to combine them.

### Steps to Reproduce (for bugs)
It's a persistent issue since reinstalling.

### Versions
<!-- Please run commands and include versions below. -->
- **Node**:       `14.17.6`
- **Homebridge**: `1.3.4`
- **OS**:         Raspian GNU/Linux 10 (Buster) 

### Configuration
<!-- Please include the TplinkSmarthome platform section of your config.json file.
Paste between the the two ``` lines below.
-->
```{
            "name": "TplinkSmarthome",
            "addCustomCharacteristics": true,
            "deviceTypes": [
                "plug",
                "bulb"
            ],
            "platform": "TplinkSmarthome"
        }

```

