It's rather strange, but when I manually drag them into my timeline, it ends up tall, yet when I just change the source from dvcpro50 to prores, they're more letterboxed.

The latter is what I always assumed was "correct". Now I'm not so sure.

Which would you guys say is the correct size and what would I do to change it to the correct one? Remember, these are both referring to exactly the same video file, but for some reason, are displaying differently depending on the method in which they were added to the timeline.

Resolution of the original file is 720x576 (PAL 16:9)