Whenever I render my video it comes very small in the middle of a black screen. The media being used is 1920x1080 and the rendering ratio is also 1920x1080 so is there any reason why and way to fix it being rendered this way?
You don't say which version you are using but probably you've placed your clips on the "Picture In Picture" track. Move them to another track, or delete or mute the PIP FX from the track.