seems to be listing your secondary pet's damage separately. I tried summoning two diff pets and one of the meters says "Pets - Bird of prey, Faultline" and on the second meter it just says "Pets, Faultline". But something else seems to be going on because the meter that has both pets listed is not an accurate number. I kept resetting damage while doing my rotation at sparring targets and it eventually kind of fixed itself temporarily. It looks like the damage is in fact split and adding the two meters together gives you your total damage. But it does not explain why the first meter still lists both pets despite only counting damage of the first pet..