Video export does not change resolution

Hi,

I have imported some video files from my GoPro (2.7K-50fps) and done some editing in Virb Edit (a few titles, gmetric from my Edge 820 and some music). I have exported the video in 2.7K, 1080p and in 720p. The 2.7k version is fine, but the 1080p and 720p just show a portion of the original video. Is this behaviour correct?