Originally Posted by
markjenn
It's off the bike, but I know how to route a RD cable.
Let's just leave this as a mystery.
- Mark
There are no mysteries, only puzzles to be solved. You posted it, we're going to run this into the ground.
As Andrew and I said, swapping those two derailleurs should be inconsequential. The symptoms you describe indicate some sort of problem- we're just trying to figure it out.