It all gets a bit confusing, doesn't it? Especially when the version numbers don't get updated when updates are released.
I don't
think @DaBaeda 's track overwrites Jim's, I think it was based on a different update by
@__EASY__ ... I think.
But even Jim didn't update the version number or add his name to the UI on the version he updated, so tracking the changes can be tricky.
I'd hate to know how many personal tweaks to cars and tracks I've lost over the years when updating to "new and improved" versions. I'm in the habit now of putting notes in the UI and increasing the version number dramatically as a warning flag on any stuff I've altered for personal use, or saving it as a brand new car or track to make it unique.