So I figured something out that surprised me a little with this whole DMZ BS Between PS4 and PS3.
First my set up was PS3 in DMZ of route, UPNP Turned on r - Result Open NAT
PS4 was just static IP w/ UPNP turned on - Open NAT
Went back to PS3 and had Moderate... Sound Familiar? Well i deleted all UPNP Forwarded ports and then PS3 became open again. So will try not using UPNP on the PS3 and see what happens.
But i guess once you turn on UPNP those ports seem to remain forwarded to the other. Annoying i know but perhaps turning off UPNP ont he DMZ enabled device will help.. Worth at try.