It seems that the DHCP doesn't assign an IP address which I have set to assign manually to a device, Any reasons why it shouldn't do that? I have set it to 192.168.1.21 but it seems to get 192.168.1.128 (AC88U, 382.2)
Make sure you hit apply after assigning your ip's. You can also reboot your devices and then the router and it should assign your manual ip's right away.