O.K. , go get a spare nut the same threads as the shaft has and thread that on 1/2 way , then use a centerpunch to put a divot in the middle if the shaft where's it's all mooshed from the puller's bolt sliding off , now try the two bolt puller again , be sure to use two BRAND NEW bolts with flat washers under thier heads and be sure the bolts are sticking out the _EXACT_ same distance as this greatly affects the pulling off to one side (bad) , it is normal that the bolts only screw in part ways . you need space between the puller's frame and the shaft and nut . tighten the puller's center bolt a bit , not terribly tight and then give the head of that bolt a GREAT fetching WHACK with a 32 Oz. or _LARGER_ hammer , do _NOT_ tap on it ! it needs the shock to pop the steering wheel loose .
Once it's off , get a wire bristle toothbrush from the .99 CENTS store and scrub both the shaft's splines and the splines inside the steering wheel's hub untill both are bright & shiny then smear brearing grease on then before re-assembly and don't tighten the heck out of the nut , only enough to flatten the split typ lock washer ~ you _DID_ use a split typ lock washer didn't you ? .
If you allready messed up the threads on the shaft when the puller slipped off , don't panic ! go to harware store with the nut in yur hand and ask for a " Thread File " this is a long square thing with four (8 ? that's a nice one !) different threads cut into it , have the store guy show you which thread to use and practice using it on some old bolts first ~ it really works ! .
I hope this helps...
-Nate