u/heartbroken187

I'm sure I'm not the only one that's thought of this but I'm trying to figure out how the underworld works with the timelines. They're all running parallel to each other because timelines can visit other timelines. When Quentin and Julia go to the underworld looking for her shade the guy at the counter says they've died 39 times and their computers don't handle it well. In one of the timelines we know Quentin hasn't died yet because he becomes with beast just without his shade. So, is the underworld computer wrong? And what happens to their soul when they die in the other 39 timelines? Are there 39 other versions of them that have been to the underworld? Did they move on right away like Quentin in timeline 40 did? How's all that work?