The text list is the one the job will use.
The GUI will reflect what is currently available, but there is no way for the GUI to reflect things you previously selected that are no longer there.
A good best practice when using file selection lists is to select all things in the GUI (check mark the top level of the volume(s) and then go through the list and specifically uncheck only those items (like \Recycler) you do not wish to back up.
This will eliminate many 'failed' jobs that are really out-of-date specific directory selection lists, and will protect you if someone creates a new directory to store information without telling you it needs to be backed up!