wiii taking preference over ethernet
### Raspberry Pi Model

Raspberry Pi 1 B

### Describe The Bug

I want my ethernet connection to be the only WAN available. 

WiFi is overwriting all internet settings. It should be eth0 which IS connected but if I disable WiFi then I have no connection.

Not sure what is going on. It says in the manual that ethernet should overtake WiFi if it is detected.

Any ideas on what I am doing wrong?

### Logs

```text
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether MAC-ADDRESS-HERE brd MAC-ADDRESS-HERE
    inet 192.168.1.40/24 brd 192.168.1.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::IPV6-ADDRESS/64 scope link 
       valid_lft forever preferred_lft forever
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether MAC-ADDRESS-HERE brd ff:ff:ff:ff:ff:ff permaddr MAC-ADDRESS-HERE
```
```
