Hi Rafael,
I just looked at EC 5.4.3.5.
At cofactors, all three views are indicated, but in Amend mode the views are chosen to be ENZYME&IntEnz.
It is only a problem for the cofactor field, e.g. if you look at EC 3.1.3.1 the views of the PROSITE link is correctly shown, but not the views of the cofactor.
/Kristian
Fixed in intenz-curator-4.2.14.