30fps changed to 50fps
Dear all, I went to export my sequence to find that it has changed at some point from 30fps to 50fps. The footage includes two video tracks - one originally recorded at 50fps and the other at 29.99fps (I did not shoot this and had no control over the fps). I was told to set the sequence setting at 30fps.

This is what I get in sequence settings ...

And this is what I get in the quick export...

WHAT MIGHT HAVE GONE WRONG?
HOW CAN I RECTIFY THIS? It is a 40-minute video and it will just be used online.
Many thanks
