Whoa! This is pretty interesting. I did this PCV job about 7 months ago, and have since developed an oil leak around the turbo. I figured something was up with the send/return lines at the turbo, and I would just address it in the spring, when the weather gets warm enough to work out in the garage again.
So, for my 1997 GLT you are saying that the topside routing of the box is essentially backward, in the FCP/VADIS diagram, right?
I'm going to have to check this tonight when I get home. Since I usually print those diagrams off and follow them when I'm working on the car, there's a pretty good chance it was done wrong.
If it's been installed backward all this time do you think the breather box is saturated and now needs to be replaced? The thought of doing this job again is not a very happy thought, right now...