Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
You misunderstood the behaviour of wrapping (which is, arguably, not described precisely). It is not that when going from positive to negative you always end up with 255. You need to wrap through 255 to lower values, if necessary, so -1 becomes 255, -2 becomes 254, and -12 becomes 244.
Maybe this paragraph will help? https://docs.codewars.com/training/troubleshooting#timeout
When you see these numbers, the 2nd is the total number of solves shared across all languages and the first is the number of solves in your language (PowerShell). So there have been 14 people solving this kata in PS, while - for example - 2958 in Python.
edit - I scrolled down to find the author of the PowerShell translation but it seems the user has deleted their profile:
https://www.codewars.com/kata/555624b601231dc7a400017a/discuss#5dd0a63797512c001dc87f0b
since it's a niche language, if you don't get a PowerShell user to help you on here your best bet would be to check the Codewars discord if you think there's a problem with the translation.