Recently I’ve encountered a different format of links. In the attached screenshot the top two links are what I’m used to. Occasionally I get links that look like the bottom three.
It looks like you have Settings > Files & Links > “New link format” set to “Relative path to file”. The fist 2 links would be to notes in the same folder as the note that links to them, and the last 3 point to notes a level up.