I recently got two new pets, Hastings & Tomy and in the screen where you can change the pet order they are at the end of my pet list. When I look at my pet overview page, they are also sorted last. But on my profile and in my item menu they show up first. So I've almost accidentally fed/read things to my two new pets instead of my main pet which should be listed first.

that sometimes happens with newly adopted pets. just go to the pet order page and put your pets in the order you want them, then click 'order pets!' it might take a minute to update across all pages, but that should get them in the correct order.

I already moved them around a few times but it never worked up until now. I clicked "order pets" instead of "save as custom" now and it worked. Thanks!

'save as custom' just saves the order so that you can click the 'custom' option to have the pets instantly go back to that order, but you still have to click 'order pets' for them to actually show up on site in that order.