Difficulty controlling a compatible Z-wave device will come down to general Z-wave installation best practices.
It doesn’t look like you have a related Surety account so I cannot view your devices, but generally speaking, with Z-wave locks, if they are more than 20-25 feet away, or if you have multiple locks, there is no getting around needing repeating devices to improve the network signal range and strength.
Please see this post for tips on how to improve your network.
A couple other general tips:
- Z-wave locks must be learned in within 6 feet of the panel.
- Always run a network rediscovery after adding a new device/devices.