Note that he mentions a number of incidents that he was retained to investigate, due to his expertise.
Salford.
The Celeste.
The Manassas.
What do all those have in common?
Is he a crazy old man, or does he know uncomfortable truths about the nature of reality?
Where do you suppose he's from, originally? What 'expertise' was he referring to?
His inclusion wasn't a slap at old timer fans, but a shout out to core details of the setting having shifted abruptly early on, and people remembering them differently. The odd behavior was a nod to, in BattleDroids, neurohelmets working differently and a trend of DroidWarriors becoming more robotic over time, losing their humanity.
In-universe, he likewise remembers things being different, "back in his day." There are implications there beyond just "he's crazy," if you know the context of those misjumps.