At the end of the Zookeeper's quest, when people are rewarded an extra bonding slot, the message will say: "Congrats! You have learned how to bond one additional pet!" "You can now bond a total of (x) pets" The number given for (x) should be the new maximum bonded pets value after being granted the reward, but every time I have done the quest the message provides the previous value which I have seen result in confusion until people are told they can check their new maximum bonded pets value using [wallet or [profile. Thanks for reading!
I'm pretty sure this is a known bug, possibly posted further down the sub-forum somewhere. It is known but as one might imagine, a low priority.