Not sure why there are "3" push rods. Not sure what the 3rd. one does on that model. There should be 2..one each to actuate each of the ailerons. Anyway, this mechanism has to be almost flawless.
Anyway, I found that the purchase of a few really inexpensive parts at a hobby shop made my assembly better than the one included in the kit....
Buy some rods that are a bit longer than the ones that came with the kit (threaded on one end). Get some plastic (nylon) clevises for the size of the torque rods that come out of the plane's airlerons (may come in something called an airleron linkage hit). If the clevises are hinged or free to pivot..all the better. The clevises aren't threaded but once you start screwing them onto the torque rods they will self tap. May seem to be hard to thread on but take your time and slowly thread them on with a small pair of pliers being careful not to get too bullish and crack or break them. They will unscrew and go back on much easier after that if necessary. Align the clevises by rotating so they are in a straight line toward the servo control horn.
Thread the threaded end of the pushrod into the other part of the hinge-type clevis piece and run it onto the pushrod as much as possible without interference of the hinged joint motion. This will give you the most amount of adjustment afterward.
Move both airlerons to the neutral position (the wing bottom is flat so place a straight edge on the wing bottom and move the airlerons by hand so they're in line with the wing bottom.
). If the clevis is a snap together type (I don't prefer the solder on type) Cut a short 1/4" long piece of fuel line and slip it onto the rod. This can later be move up onto the clevis locking point to provide some safety preventing the clevis from popping apart.
With the airleron position neutralized as described, mark the pushrods about 1/4" past the holes in the servo horn you want to use. Remove the pushrod from the clevis and make a 90 degree bend at the marked spot. Some servo control horn holes have to be reamed out slightly with a drill to insert the pushrod.
Insert the pushrod ends into the control horn hole and secure. Those nylon snap-type that lock back onto the shaft of the rod work well to secure the rod to the servo. Eyeball both airlerons to see if they both are still in the neutral position. If 1 or both need adjustment remove each pushrod one at a time from the servo and shorten or lenghten by turning left or right at the threaded point of the clevis. Repeat until both airlerons are true. Don't forget that slip-on fuel line locking piece.

I hope I haven't been too long winded in describing stuff you may already know but a bit of extra effort in the beginning can save a lot of headache and money. It's always best to keep any pushrods as straight as possible. By bending any to compensate for alignment purposes builds a natural spring into them that can drastically affect performance. Good Luck,
Jim