Question: I would like to create 2 VMs in VirtualBox that have "normal" network interface as my host's. I have set up them with Bridged Adapter but unfortunately they get both the same IP. So I cannot login to any of them. How come they get the same IP?

Answer: 
The problem described seems to be related to a [DHCP binding the IP to the MAC Address](https://forum.netgate.com/topic/94221/dhcp-how-to-distribute-ip-s-by-mac-address-instead-of-sequentially).  

Please, check if both the VMs have the same MAC. If so, generate a new random MAC by clicking the blue icon beside the MAC Address box under the advanced options.

[![Network Settings](https://i.stack.imgur.com/XrSG5.png)](https://i.stack.imgur.com/XrSG5.png)

Once the VMs have different MAC Addresses new IPs should be assined by DHCP.
Do you have a DHCP server outside of your host machine? For example a Router. Bridged Networking assumes that. 

Can you switch to NAT temporarily and see if that gives you different IP addresses for each virtual machine.