So you get spark on the center coil to distributor wire and when you make a direct untimed connection with the rotor to the inside of one of the posts on the distributor you get spark on the outside of that post. I'll assume you checked more than one of the posts with the same result.

Sounds like a timing issue. You mentioned that the timing belt was okay. Was that a visual on the belt, or did you insure that the cam was turning while you cranked?

Maybe jumped timing? Used to see this a lot on older cars with stretched out chains, not so much with rubber belts which are more likely to break than stretch. Try checking if the rotor is pointing to the #1 post when #1 cylinder is at TDC.