I picked up a set of 3 Deco XE75 Pro a few days ago.  I really want to like these, but I've run into two issues that I can't get around.  

The first is the DHCP server.  I run my own DHCP server, I don't want the router doing DHCP.  Is there a way to disable the DHCP server?  I know about the auto-disable, but that assumes that my DHCP server comes up before the router's does.  After something like a power failure, if the router comes up first it starts handing out IP addresses.  Then my DHCP server comes up and it doesn't know about the addresses already handed out by the router.  I need to be able to turn off the DHCP server in the router.

Secondly, I want to be able to pin down which port is the WAN port.  This is another case where the auto sense mostly works, but I need it to always work.  I'm not sure how it decides which port is the WAN, but I had one time where it thought my LAN was the WAN port and it picked up an IP address from my internal network and tried to use that as the Internet IP.

If I can solve these two things I think I can live with these routers, otherwise I need to return them to Amazon for something else.  Does anyone have any suggestions on how to fix these two things?