Richzendy on "get a post from a new template page"

Hi, i don't know how explain this, but i will try:

I have a custom post with a custom template page:

http://www.example.com/calendar/

This works and will show a list from my custom posts named calendar

http://www.example.com/calendar/date1
http://www.example.com/calendar/date2
http://www.example.com/calendar/date3

This Works also and shown events with date1, date3 and date3.

But i want add a new extra field to my custom post named calendar, i created two new pages (stats is a page parent by race but for the moment is not important):

http://www.example.com/stats/race

The race page has a new template page and only shown a list by calendar posts with my new custom field (named stats), and works, the links to each item has this format:

http://www.example.com/stats/race/date1
http://www.example.com/stats/race/date2
http://www.example.com/stats/race/date3

In this moment i get 404 error by each url, i can't use single template page here, how i can show a custom template by each item?, i want only show the stat field to each item in this pages.

Exists other choice to make that?

Any help can be appreciated.