NetworkManager creates duplicate networks

[Anthony]

I have two networks:
1 x Wireless network
1 x USB dongle ( MobileBroadband)

The issue is that NetworkManager assigns the same network for both of them so I can't do any kind of routing and basically one network is unusable. Even worse sometimes the network is not working at all because I guess the packets get confused on which NIC they should go. I can provide more debug information upon request.

 ip route show
default via 192.168.1.1 dev eth1 proto static
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.100
192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.100 metric 1

 ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    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: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether ec:a8:6b-MASKED brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether f8:16:54:-MASKED brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global wlan0
       valid_lft forever preferred_lft forever
    inet6 fe80::fa16:54ff:fe96:c648/64 scope link
       valid_lft forever preferred_lft forever
46: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether 58:2c:80:-MASKED brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::5a2c:80ff:fe13:9263/64 scope link
       valid_lft forever preferred_lft forever

Ubuntu 14.04.1 LTS