Originally posted by: Kensee
Yep, the multiple moves you guys see are just different abilities of the Shaki n stuff (this is noticed when Ichigo says thats impressive but his sword only taught him ONE ability). Pretty much what he is saying is the answer to all specilation, that in fact there is only 1 shikai and only 1 bankai, but of course you can learn certain techinques for each form (usually the Shikai form). In tossen's case, his shikai has two attack techniques .. the circle he used on the Quincy, and the Rain of blades he used on Kenpachi, that is not his SHIKAI but just attacks he can use (much like how Ichigo can use the attack technique that shoots out a beam of energy etc).
Bayaka really only has 1 bankai, its just he cna manipulate it depending on his situation. If he wants defense and attack, he does sakura flowers, if he wants all out attack and no defense he does his sphere of swords thing.
Yeah and theres still a lot of the story to be uncovered (hell the Manga isnt that farther off from the anime so even manga readers still have so many unanswered questions). SO just sit back and let it come =D.