Populating REIT sector in Norgate

I'm using Norgate Premium data. I have a system for managing REIT investments which relies on the Specialty, Residential, Commercial and Diversified categories under the financial sector. Recently, all of these have gone to 0 members, and I cannot repopulate them. I have tried using Organize Assignments under the Symbol menu to hand add some tickers to the categories, but they disappear again as soon as I do a maintenance.

Have others had this happen? Is there a way to get back to the old category members for these REITs? I could make a watchlist, but I don't think I could do a good job maintaining the symbols as new REITs come into the market and old ones change business models or go away.