I have just started Rank 2 of 
Prestige 4 in the 
Mesozoic Valley, and I am being offered Trait cards for the 
Argentinosaurus already.
#Incorrect traits being offered
tranquil hedge
stable torrent
Oh yeah, I'm pretty sure this is carry over from before the prestige, resets every 15 minutes. It seems it loads an entire set every 15 minutes, not just the top cards because when I encountered this before, buying the top cards still have me options you'd see on rank 50
tranquil hedge
Thanks for explaining. I guess this one is a low priority bug then.
stable torrent
Yeah, I'd guess so, although it might not be hard to add a condition that automatically resets the cards when a player prestiges
tranquil hedge
True, but if you are already at the stage of Prestiging, even for the first time, then spending 100
Mutagen to get an unnecessary/unusable upgrade out of your way probably isn't going to break the bank.
stable torrent
More-so the problem would be buying traits early, I think the ones I bought at rank one actually stayed when I unlocked the card later, but I can't remember