2 questions about biju-chakra and bijudama/rasengan
A few days back I read a thread about Minato sealing only the yang-half of Kurama´s chakra in Naruto and whether Naruto only holds half of the Biju or if a Biju replenishes the missing part over time. In episode 264 Naruto learns about the Bijudama and tries to use Rasengan in KM, but can´t manage it since it turnes into a Bijudama and he isn´t able to use the right amount of "positive and negative" chakra.
Are these 2 red and blue kinds of chakra the same as the ying and yang mentioned above?, if yes that would also answer the other question, since having ying chakra again means that Kurama replenished.
Secondly, Naruto tried to use a Rasengan, not a Bijudama, since it didn´t work and turned into a Bijudama instantly, I have to assume that he can´t use a normal Rasengan in KM. He learns to control the Bijudama, but I think every normal Rasengan should turn into a Bijudama. So how is he creating normal Rasengans in the latest episode (296)? Where and more importantly when did he learn that?