I think is something new from chess.com,  in the past I remember seing challenges for months, but now they tend to disappear, but takes like 2 o 3 weeks for them to go away, 

Well it has been taken care of now, we are both in registration. Probably just a bug.

sHEDULED TO LATE START ON 3/12

2014 Pan-American League-R2: Equipo Ecuador vs. Nicaragua

http://www.chess.com/groups/team_match?id=380832

2014 Pan American League R3 - Division B -

Bolivia x Venezuela

Team Colombia Vs Team Canada

http://www.chess.com/groups/team_match?id=383874

http://www.chess.com/groups/team_match?id=387730

USA NC vs USA SW

2014 Pan-American League:D-B:R-3:Equipo Ecuador vs. Guatechess

http://www.chess.com/groups/team_match?id=388340

Round 4
Division A
Team Brazil x Team Canada

Round 4
Division B
Bolivia x Cuba

http://www.chess.com/groups/team_match?id=396668

USA NC vs Colombia

Colombia vs USA NC  match

http://www.chess.com/groups/team_match?id=396668

Round 4 Div B

Team Peru vs. Nicaragua

http://www.chess.com/groups/team_match?id=396404

Round 4 Div B

Equipo Ecuador vs Team Jamaica

http://www.chess.com/groups/team_match?id=396908

Round 4 Div B

Guatechess vs. Team Costa Rica

http://www.chess.com/groups/team_match?id=399056

Round 5 Div B
Bolivia x Team Jamaica

Round 5 Div A
Team Brazil x Team Colombia

R5 Div B

Team Costa Rica vs. Team USA: Northwest- http://www.chess.com/groups/team_match?id=410030

R5 DIV B

Nicaragua vs. Guatechess- http://www.chess.com/groups/team_match?id=410068

R5 DIV B

Team Venezuela vs. Equipo Ecuador- http://www.chess.com/groups/team_match?id=410078