Ah, oops. I thought he meant an archive of researchable tanks, not one for tanks that would show up in the future.
They might have to revamp how the research lab gets updated then. As it is right now, it's clearly on the fly because every once in a while a patch will accidentally refresh it again despite there still being a few days left before the next refresh.
ODETTE SPOILERS
I dislike Odette's story because the general is supposed to be competent, but apparently he's willing to let a tank get away with jeapordizing her comrades' lives (or worse considering that the enemy is capable of giving you a fate worse than death by turning you into a zombie) and disobeying orders as long as she has sex with him.