I have an Uppababy Vista with the seat and bassinet combo and we recently purchased the Chicco carseat adapter. All 3 of these seats are wobbly when attached. Has anyone else experienced this? The little "dots" on the sides turn green, so I know that it's locked in properly, however you can sort of rock it back and forth a little, which makes me think it won't be a very smooth ride for baby. I might just call customer service, but was wondering if anyone else had this experience and if that's just a design feature possibly or maybe we've done something wrong?