This is a question for anyone who has seen Colossus (or ridden) in person, not in a pic.
I have viewed many a photo of this coaster, and have picked up this fact.
In 1993, they flattened out a double dip to add a midcourse. I have seen before and after pictures of this.
It seems they just built the midcourse over the double dip, and let the double dip track remain.
Did they do this, or am I just seeing things? ;)