I believe that bolt & spring is there to provided tension & should be adjusted to a medium setting or just a bit more.
I don't see where the out-feed table is adjustable according the PDF at the URL you provided.
You'll need to make sure the blades are set the same height as the out-feed table.
You need a good straight edge to check if the tables are co-planer to each other if the out-feed end of the out-feed table is low you may have to shim it if it can be done. It looks like the out-feed table is held on by 4 bolts you may need to loosen the 2 bolts furthest from the cutter head & slip some shims between the bed & base of the joiner.
"Forget the flat stuff slap something on the spinny thing and lets go, we're burning daylight" Bart Leetch
"If it ain't round you may be a knuckle dragger""Turners drag their nuckles too, they just do it at a higher RPM"Bart