PCI nic not working correct

So I bought a gigabit PCI NIC to boost my poor 100mbit internal NIC of the motherboard. It is a TPlink gigabit NIC. OMV detects the device and I can assign the network parameters for the device.
What is strange is that I can ping the gigabit NIC(192.x.x.41) from my laptop when the only cable going to my OMV box is connected to the 100mbit NIC(192.x.x.40). Surely this can't happen? Why is this? When I only connect the cable to my gigabit NIC only, I cannnot connect to OMV at all! All the network configurations are static IP addresses and there are no other device on those addresses. I cannot seem to figure this one out.

Ill try disabling the nic tonight.

When I disabled my internal NIC and set the parameters for the PIC NIC via omv-firstaid I could communicate again with OMV. I now only have one NIC working on the system.

I wanted to use one nic for trabsnission bt & media streaming. The other to manage my server remotely.