Whereas Disjunct is where a sime has Killed and disjuncted, unjuct is where there is no signs of junctedness. Digen Farris was technically junct because he had his junct pathways opened, but he had never actually Killed. With the use of Kerduvon those junct pathways were altered so it seemed as if Digen had never been junct.
At that time, the Tecton knew little or nothing about the connection between the junct pathways in a higher order channel and the Endowment functions. For the results of their ignorance in Digen's case, see RenSime.