Events Duplicity and URL problem

Hello,

Could you please help me ?

I have a event's duplicity problem. Each new event created is shown two times.
Example http://wemum.es/agenda-eventos/2013/03/charla-con-el-doctor-gonzalez/

Also, i have a problem with the NEXT button in the Groups Calendar (buddypress groups) ->
Example->
http://wemum.es/grupos/enfermedades-raras/group-events/

Next button goes to the URL (http://wemum.es/groups/enfermedades-raras/group-events/2013/04/

Maybe this can help you - > my group's page URL is grupos (not groups)

Thank you very much,

Best regards,

Pablo