It's possible some of the parts got bent in shipment.
However, since their 1.0 and 1.2 meter dishes have side support struts for the LNB, it's not so likely the LNB arm is tweaked.
It's possible you have the bracketry assembled wrong on the back of the dish.
The bow-tie assemblies are easily mounted wrong (if I recall from a very old thread).
Be sure you placed the dish face-down on a flat surface and checked it for warpage before assembling it.
That said, the markings on the elevation are not so accurate.
But, it's not a commercial transmit-rated dish, so it's perfectly fine for our FTA use.
I found when helping JsatTV back in mid-2007 with his, that the elevation pivot left a lot to be desired.
You might find the dish slips a lot when trying to tweak elevation.
Give a look to
this thread where he incorporated some changes, and see if you think the elevation pivot bolt mod might help.
As for the dish being off, just assume it is, and swing up and down about 5° looking for your bird.
This is not rocket science, so don't expect everything to be right on target.
I'm sure you'll find your satellite. - :up - and don't forget to set the proper skew, too!
edit: also, see the docs for what to aim at the elevation markings
the edge of the metal behind 'em, or the center of the bolt???