dude this is the difference:
Sw rodeo is very similar, as you must have found, to a switch cork 5, the difference is that the sw rodeo moves around the side while the switch cork is more like spinning around an imaginary pole driven through the top of your head and into your body.
 How do you fix it?  say you're comin in switch,  for a sw cork you kinda throw it to the right, (looking up hill since  you are goin switch) while a sw rodeo is more straigt ahead (straight uphill) or even to the left.  so if you are corking it is likely because you are throwing it too far to the right and in effect counteracting the movement around the body of the switch rodeo, so throw it more to the left (looking up hill once again) how much to the left is a bit personal and you will have to figure out on a tramp or diving board etc. (keep in mind, 'more to the left' could mean straight ahead so dont huck your body hardcore to the left, when i do it , i look over my left shoulder, and throw pretty much straight up hill)
Good luck, tell me if this makes sense or if you need more help.