It was the same way in NL with the vampires. It seems like it's always this way with every EP.
Yeah it seems every EP comes with something completely retarted. I still remember how the influence wants used to clog the want boxes endlessly.
The other thing i noticed in pets with the wants is the obsessive behaviour of wanting to command their pets every few seconds to do useless crap. Thankfully one of Pescado's in testing hacks works more or less perfectly for that.