Howdy Boys
I took some pictures, to maybe make the situation a little bit more plain.
This is a picture right out of the Dixie catalog of my rear sight:

Notice the orientation in the picture. They are showing it leaning about 45 Degress forward, with the sightcup to the rear. This is not the dirt cheap one that Dixie was selling, this one is one grade above that.
The next 2 pictures are of the sight in the straight upright shooting position:


This one is a little bit more of a closeup:

These last two are of the sight folded forward all the way down:


Please excuse any gridue that shows up in the photos, the flash highlighted it.
I really don't think I have it mounted backwards, I mounted it just as you see it straight out of the box, without reversing anything, and the Dixie photo plainly shows it leaning forward, with the longer section of the base to the front and the eyecup to the rear.
The first two photos show the tensioning spring pretty clearly. The flash tinted it a little bit reddish. It really isn't rusted. I tried messing with the tension to see if I could get the sight to lean backwards. No go. The spring is mounted by a slot, and the tensioning screw passes through the slot. The slot is to adjust the position of the spring to keep the sight perpendicular when in the detent position. If I loosen the screw at all, the spring slides around and will not stay in place, so the screw has to be snugged down and the spring at max tension to maintain any repeatability.
The last photo shows the slot detent the spring pops into pretty clearly. The geometry of the slot and the spring is what prevents the staff from leaning back past vertical at all.
The two screws the staff pivots on are pretty clear in the pictures too. One knurled slotted screw threads into the other one. It takes two screwdrivers to apply tension on them to keep the staff from flopping around. I really don't know if the screw Seth pointed out would fit, or help at all.
That's the photos, I'm pretty resigned to either living with the sight as it is, or replacing it with something better.
Any other thoughts?
Thanks for the comments so far.