I have successfully completed Coretech questline, but when I have talked to Ruppert Simmons, I have told him that I already met Acid Hunters and have met Tchortists in Coretech facility (it was possible with the little help from Phreak). It completes the Coretech questline, and I have got my house.
But, after that, messenger near Core City entrance told me that I need to talk to Ruppert Simmons again. And Ruppert gives you Acid Hunter quest again.
