It does make sense.. you state HH interacts with base game.. how so? i enquired about HH and posed an example learn2inglish...
#1 If you killed Caeser there is additional dialog in HH
#2 If you completed "You can depend on me" there is additional dialog in HH
#3 After finishing Honest Hearts the new weapons, ammo and mods added by the DLC start to appear in the Mojave shops.
And I think your the one who needs to learn english.
Also the whole Ceasar interaction where you tell Joshua you already killed Ceasar is only a few lines of dialogue.
Yes a few lines of dialog, and the reason that can't be done again is?
Also Jason bergman said so that interacting with Christine in OWB does not affect what happens in DM.
He also said that the DLC can't interact with one another or the basegame which is already proven false.