I had the same problem one time, I started a new game and this time the problem didn't occur.
It looks like it had to do with when and where you saved the game.
I noticed that after a save some painting have turned false.
In the new game I didn't have to seek for the clues because I already found them, I played untill I had turned all the paintings in the correct direction.
It is possible that I made a remark about this problem in our walthrough.
You can find the walkthrough at :
www.pcgameswalkthroughs.nl you find there a English and a Dutch walkthrough for The Initiate 2.
You don't need the new room to find the astrological signs, in the rooms of Sam, Ben and Steve is a iron door with a hatch.
You have to play with all the switches of the doors to change the color of the light.
I have explain that in the walkthrough.
Good Luck Lion_1251