Unresolved Extruder defaults to high

So I have been having quite a bit of problem with my new robo3d everything from stuff no being put together right, and I still have never been able to get a good print out of it. It started out with everytime I would print it would raise the extruder to much every time so once you got to a certain height the print would be ruined. My new problem is now when I ever try to print, it does its homing cycle, but when it gets to its third contact point instead of lowering to try to find the bed it just immediately goes up two times and never goes down to it's contact point. It does it again for the fourth contatct. and the when it gets to the center of the bed for the fifth contact point it lower and makes contact like normal. The problem now is that when I try to print the extruder is way to high (probably due to it not leveling properly) and the print just comes out like a mush.