As per my comment on that thread - the information presented is from a single point of view and not necessarily the whole truth.
I understand that Inaba sensei had 17 months of training with Kunii sensei (thus 1.5 years which is quoted elsewhere - certainly more than the "less than a year" dismissive comment). The certificate he received was posthumous (of Kunii sensei). As I understand it, some (personal) communications (between Kunii sensei and Inaba sensei and others) shed a slightly different light to the statements in the blog entry - more than that I cannot say without breaking confidences.
Life is not always simple - especially when you include people and their egos