The call to hr should have been made from the tm’s office with him present either by him or yourself weather he likes it or not. Not signing any right up, right or wrong, upon request could constitute refusing in the eyes of management. Any form signed at this point is a done deal. You do have rights as an employee, union or not.
Are you guys forgetting you work for an (At Will Employer), if he tells you sign, you sign or get your coat!!!
BTW, did I miss your answer to post 105, in (Strange or but True?)