I don't mean to distress you further, but I had exactly the same problem
with that jointer and the only solution I could find was to Get A Better
Jointer. I could never get the infeed and outfeed tables to parallel, and
even when I thought it was close enough, my work was bowed, with much
shorter stock than you're using. Hate to say it, but my best advice is to
find more room, return that jointer (if you can - I lost $50 when I
returned it to amazon cause I told them it was inadequate, not that it was
defective), and buy a better jointer.
Then, if you're like me, the jointer will be the least of your worries.
You can then agonize over your inadequate TS fence, the crappy collet in
your router, the wandering arm of your RAS, etc, etc.