Recently received the passenger side swivel from SwivelRus; unboxed and to our surprised the swivel does not "swivel". Attached pic show the adapter in locked and unlocked positions. In the second pic, the orange handle is pushed to the maximum (unlock), but the silver metallic plate still does not clear the hole on the top black plate, thus the swivel cannot rotate. Is this a common defect?? Dread returning this big thing to SwivelsRus. Anyone has any idea please help. Thank you!!