Okay i thought my house was wired correctly- guess not? now what?

There are a couple of model Z wave switches that don’t require a neutral, but those were only work with incandescent bulbs, which most people don’t want to use anymore. If you do want to do that, Cooper makes one.

A better alternative for most people is the Lutron caseta switch. They use their own proprietary communication protocol which is very fast, and have a switch that does not require a neutral but can work with LEDs or CFL’s. There is an official SmartThings integration, although you will have to buy their “smart bridge” to make it work. A number of community members have it and say it is at least as fast as their zwave switches even though it is cloud to cloud. One SmartBridge can support about 40 of the light switches.

https://www.smartthings.com/products/lutron-casta-wireless-600w-in-wall-dimmer

Of course the Lutron switches cannot act as a repeater for your zwave locks, so you might need to also get a zwave pocket socket for that part of the house.