The seats are working correctly. They only come up to the 90 degree position, at which point you do need to use the straps to adjust the seat the way you want. Why the don’t come up any further is beyond me. I’m sure there is a legit reason, though I’m not sure what it is. Rest assured your seats are working properly, and the fact that they come up far enough that you don’t need to reach all the way into the back of the van to pull the strap is still pretty convenient (though not perfect ;-).