headlights adjustment

hi all

I'm getting a hard time trying to adjust the headlights of a 95 Lumina, when we bought the car the beam of both headlights were pointing to the center of the lane, so you can see nothing driving at night. I tried to adjust them so they point to the right place.
Firts the adjustment screws were corroded, I sprayed some WD40 and manage to make it work. I could adjust the passenger side headlight, now it points to the side of the road, the driver's side headlight is a nightmare, no matter the position of the adjustment screws are, it still points to the center of the car a few meters ahead. The height adjustment works well, it's just the horizontal adjustment that doesn't work at all, even if you can move the screw to any position.

One thing I noticed very weird is that the low and hi beams points to a complete different vertical lines, when adjusting the lights against a wall the hi beams are pointing like 4 inches to the left than the low beam, instead of just pointing higher in the same vertical line.

The car had no accidents and the headlights seems very well possitioned in their places, this is driving me nuts I can't find any info about adjusting the headlights in this kind of car.

any help with this will be very appreciated...
thanks in advance.