I am a member of 156 and I cannot join the team roster. Any help I could get with this would be appreciated.

I have added you to the roster of the team 156.
HOWEVER:
You WERE and ARE able to join it. It seems like you have been doing it wrong, because I have done it via website with default agenda>team option.

Why you think you were not able to join it?

You had to do:
1. Click on your Agenda (which had to lead you to: http://www.ensl.org/users/agenda/3939)
2. In teams tab you had to find Team 156 from the drop down menu.
3. Click join...
4. Team leader or deputee had to go to the team edit page (click on the team name from their profile or other way, which had to lead to: http://www.ensl.org/teams/466)
5. Than they had to click Edit on the bottom left corner of the team page (http://www.ensl.org/teams/466/edit)
6. Select Member tab and change your team status from Joining to: Member/Depute/Leader.

That's it. There was no problem with ant steps what so ever...

This is the guide on how to join/recruit people to the team: http://www.ensl.org/articles/702