after I looked at it more, I realized what is wrong with the harness. It's an Evenflo Triumph and it has this strange harness system (at least strange to me and we have had a few Evenflos!) The harness is all one piece and threads under the seat to come up at the thighs, then goes through the male ends of the buckle, then up through the harness slots. When you buckle your child in, you have to make sure it's even on both sides or else one side will be tight, and the other loose. It's never an issue, it just takes half a second to make sure everything is even. The strange part is that they have 2 different sets of loops (infant and toddler) where you hook the harness to the T-shapped metal splitter plate in the back. It makes it shorter for infants and longer for toddlers. You can see the stitching that makes the loop for the infant setting on the harness that's laying on the kid's chest.
In this picture, the harness is uneven at the bottom so they can only get one side tightened. The whole thing is rather loose, but the harness being uneven is what makes it look so funny.