In total you should have 3 transport zones;
- Overlay
- VLAN
- Edge-VLANs
We separate the Edge and main VLAN transport zone so that way the host doesn't have to see all the Edge VLANs and vice versa.
Each host transport node should be assigned to Overlay and VLAN.
The Edge should be assigned to Overlay and Edge-VLAN.
When you create the vlan backed segments, create them under the VLAN tz and then from vCenter, edit your edges and for vmnic 1 and 2 (2nd and 3rd one) assign each vlan backed trunking segment respectively.
When you create the edge uplink segments, assign them to the Edge-VLAN tz.
Hopefully this clears it up for you.