Setting up second domain at work. It tries to take over DHCP for both domains.

Question

So I have an existing older domain (Server 03 r2) and it's working normally. 
I'm setting up a second domain, server 08 r2. Each time I activate DHCP on it it begins handling IPs for both domains causing other issues related to DNS.
They are different IP Schemas. The existing functional is a 192.168._._. The new is internaly 169.254._._, and has a static IP for the other NIC and ultimately the internet connection. The internal networks exist on the same subnet mask for a level of crossover
for future data transitions. 
On the 08 server I'm also having DNS issues. It works fine if I have both NICs plugged in, but not with just the external IP plugged in. It would appear it was giving out it's own domain IPs and getting it's DNS from the existing domain, which puzzles me
as all these items are set to static on the cards. 
I would love any available help.
Thank you!

Answer 1

Do the same DHCP zones exist within the same switch or VLAN?  If so, they're both going to offer DHCP to any device that requests it regardless of what domain that machine may already belong to.  The first DHCP request that the device sees will
win.  You can really only have one per switching segment. 
For the DNS issue, when you say the existing domain, do you mean the 2003R2 domain?  From a command prompt if you run ipconfig /all do you see the 2003 R2 server in there as a DNS Server?  Do you see the 2008 R2 server listed?  If you don't
see the 2003 R2 server, it may just be that you're getting results from a broadcast. 
You may just need to split these two domains onto separate VLANs if they're not already.
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