Strange font double up problem

Just started to play around with the Unity gui for the first time. I have a basic OnGui script attached to a camera, when I add a Label to the layout using the out of the box the default Arial font it works fine. However, when I import my own .TTF file and set the GUISkin’s top level font to be this newly imported .TTF file and run the app, I see the new font AS WELL AS the original / smaller Arial font layered on top of each other making it a jumbled mess.

Im sure I am doing something really silly but if anyone could help it would be much appreciated.

Dont worry, I found the issue. I had a second camera in the scene which was causing the gui layer to be rendered using the normal font.