TopHatPaladin
Warlord
the vanilla game decides at random which unique to show in the DOM screen
The game does prioritize displaying units over other types of unique component. One workaround that I know other mods have used (e.g. CL's Boers and Malaysia) is to create a "dummy unit" with the same name and icon as your building; if this dummy unit is inserted immediately after your normal UU, everything should appear as desired.