How to reproduce:

1. Open attached project
2. Open scene main.unity
3. Resize the Game view
- Note how the text moves around and changes position based on the size of the view
- The problem is more pronounced in versions where Unity supports Retina displays (5.4+)

- Reproduced in Version 5.4.0b11 (323b0238353b), Version 5.3.4f1 (fdbb5133b820), Version 5.2.4f1 (98095704e6fe)
- Not Reproduced in 2018.3.0a1

- Won't fix: In 5.4 retina support is enabled so the physical size of the game view on a retina display is much larger thus scaling by physical size would make things smaller.