Shut down the mines in Caldera - dialogue bugs

Talking about this quest:

http://www.uesp.net/wiki/Morrowind:Shut_the_Mines_Down

many dialogue conditions for "halt the mines" topics are a mess, which makes the quest make few sense and be unintendedly arcane, with characters who should hint the way to the player, not doing so. Looking at this topic reveals that many lines have contradictory conditions, resulting in them never firing, for instance:

http://pasteboard.co/wHrNYHI.jpg

it requires the speaker of the line to be two different npc's at once! Obviously, one of these "equal to" needs to be "equal to/or"

Or:

http://pbrd.co/1GvwEkX

It requires the speaker to be both the Khajiit slave Dahleena and an Imperial. (besides the contradiction, there's already a special line for Dahleena - "Shut down the mines? Dahleena is head of all slaves...", so the equal to = Dahleena condition needs to be removed, same with the "free Dahleena and the slaves..." answer).