I think something is wrong with the vertical position setting. It does not matter if I set it to -0.1, -0.5 or -2.0 they are all in the same place. I have reloaded the addon between each change and ran /guia test but they all appear in the same place.

I know this is 1 year old but, 

/guia test uses a different part of the config to adjust it's vertical position

"Private Test Announcement": {
    "Adjust Vertical Position": -0.2,
    "Banner Color": "Grey",
    "Duration": 10.0,
    "Fade In Time": 0.5,
    "Fade Out Time": 0.5,
    "Font Size": 18,
    "Text Color": "White"
  },

Yea the problem was that adjusting it via settings wasnt actually adjusting anything