I have tried to simplify the process of registering your teams are your walkers. Take a quick look at the my-teams page.
This is year all teams use teams use the same form (whether they be Endurance 80 or Endurance10). I hope it will be fairly self evident.
New is the add / edit / rearrange walkers table, which does just that, leaving you blanks to add extra walkers (up to the limit of the particular event), moving them between teams, or even delete them.
You can find more information in the help page.
If you have problems with the page, don't hesitate to contact me. After all your problem may be mine, not yours!