I'm usually in 2 vertical splits, in each one I jump in an out of files using
:Ex. When a split shows a file and I type
:Ex I expect this split to show me the netrw UI, where I can choose another file.
But sometimes instead of replacing the split,
:Ex will create a horizontal split inside this split and show me both the netrw UI and the file I was previously viewing. I haven't identified when and how, was wondering if you could help me understand if I'm using it wrong.