He’s not expressing confusion, he’s tilting his head for better sound localization. While having an ear on each side of the head is good for lateral echolocation, tilting the head so that the ears are offset gives it vertical depth.
Oh my gosh, that explains why some dogs put their head to one side when you talk to them. They’re not confused, they’re trying to listen to us better. Awww.
An early version of Lotso (from Toy Story 3) can be seen in Toy Story during the staff meeting. Woody asks if the toys “up on the shelf can hear” him, and we see a shot of a big, pinkish bear. John Lasseter wanted to use Lotso in the original Toy Story, but PIXAR had troubles getting the fur right.