vCD Nexus 1000v

I am running vCD 5.1 and backing it with nexus1000v, i have noticed that when i create a Port-Group Backed Pool, all the Nexus 1000v port groups show up as VLAN ID -1 where as the VMware Distrubuted switch shows the correct VLAN mapping

Also when i look at the overall Network Pools, the newly created Port Group Pool show -- under VDS, i would expect to see the name of my Nexus1000v switch

does anyone know why this is the case ?

Thanks