1. Kisame was 32 when he died, not 28. It's right on the wikia if you want to confirm itOkay but I have to say it is looking like those databooks are definitely incorrect.
Note that Nagato's age has never been released on the Databooks... perhaps thats because his age would give to much away or would provide people with too many false assumptions? Maybe kishi learned to not release ages any more because it can create serious plot holes like this?
I'll give an example.
I assume the databooks are right and Kisame died at age 28, but when you look at this image, how old does Kisame look?
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He is obviously fully grown and fully filled out, which implies he is at least 18 years old, if not his early 20's. But if that were true, than there is no more than 10 years between Kisame meeting Tobi and his death. This is 100% impossible because we know for a fact that Akatsuki was having meetings with all members present at a minimum of 10 years ago.
Now considering Kisame was one of the first members, which was implied through this conversation and Tobi's level of trust for Kisame, they must have met multiple years before that.
Now I can't confirm the time exactly, but I'd assume this event took place between 12 and 14 years ago, before Akatsuki was formed and after the nine-tails attack. I am just trying to provide evidence that the Databooks are likely to have flaws if not totally incorrect in some instances because there is no way Kisame is 14-16 years old at this time.
2. I can tell you this event happened between 7-16 years ago, why? Because the Uchiha massacre happened 7 years ago, and since Kisame joined the Akatsuki before Itachi, he must have joined earlier than 7 years ago. And as for 16 years ago, although it's only an estimate this happened after Tobi attacked Konoha, I call BS if anyone says that Kisame is younger than 16 in that picture
But that point is that we don't know exactly when that event happened, Kishi did that intentionally to obviously cover his ass
But I will note that Kishi needs to clear up the confusion about the Akatsuki
IMO, there seems to be two Akatsuki's:
-The first one was a bunch of revolutionaries fighting for a new government in Amegakure, this group seemed to be lead by Yahiko
-The second Akatsuki was the mercenary organization formed after Nagato and his army won the Civil War of Amegakure. I believe that Kisame was one of the first Akatsuki members in this organization
Although that's only my speculation, Kishi himself obviously needs to clear that up