I have 3 zwave outlets outside. I was under the impression that they act like repeaters and should help the signal strength
That is correct.
Every time you add or move z-wave devices, you probably should do a z-wave repair to rebuild the mesh. Depending on how many devices you have, it may take several hours to a day before you might see any improvements in your mesh.
The z-wave utilities can be found under the hamburger menu > gear icon > hub name > z-wave utilities
I have tried that. Let me ask you, if it fails to update the route on a zwave device, do i need to move my hub so it repairs that route and then it will work better>?