This is what i was thinking...and that the Naruto's situation was similar to the Edo tensei's, with chakra continuously refilling his reserves...but not forcefully expanding them. otherwise, Naruto only having 4 times kakashi's amount by the time he is 16 makes no sense. Especially after seeing what saving some of her chakra for 3 years did for Sakura.lol.. this is confusing. The bold does not seem possible because its stated that excess chakra cannot be reconverted back into stamina (You must be registered for see links) but rather goes to waste. Kurama chakra=/= stamina and it would be weird to think baby Nardo had the ability to convert chakra into stamina.
Seems like Kishi might've screwed up here...