path error inserting links on units

Hi Im inserting a link in a text block in the end of my course so the student can check his grades. But when i insert the full url
http://discabos.com.br/ct/treinamentos/conheca-a-tecnologia-irradiante/notas
and i save it , it changes the link url to ../treinamentos/conheca-a-tecnologia-irradiante/
and this get me to the worng page, actually a page that doesnt exist:
http://discabos.com.br/ct/treinamentos/conheca-a-tecnologia-irradiante/aula/6-teste-de-conhecimentos/page/treinamentos/conheca-a-tecnologia-irradiante/notas

i think this is related to the same bug that i send to you about inserting images on units.

Please can you solve this for me?