2 problems with assigning authority in Patient Gen & Sharing

(1) When I look at Assigning Authorities in Pat Gen & Sharing, I see the test systems from the NA2016 session. I can remove them, but my expectation is that in a new testing session, the assigning authorities would have no systems until they are selected.

(2) This is the bigger problem: I cannot see how to add new systems to the authority. The list of systems at the bottom of the page no longer appears.