Gradebook

Hello, im facing the problem that i cant assign a id to a item in a gradebook.

Ex: I want to assign id to PPractica 1 using Pr1 as shown below:




So when i assign id i got:





If i go to properties of Practica 1 and seems everything ok ( user has its marks, maximun, minimum mark... everything seems to work).

But if i want to edit the category M9 - UF2 : Processos i fils i hve:



I have changed the name of the category several times....Doesnt work either....

Thanks in advance