For such a seasoned Sen. Kennedy should know that there's no such thing as a reserve to object. He was rightly told that by the Chair!
Speaking as Kennedy's constituent, that was beautiful!!
Actually, Senators are allowed to "reserve the right to object", and then speak on the thing they might object to. I think Brownback got sick of it being done several times, however, with nothing constructive coming of it, and simply ruled it out of order.
These guys try to make it up as they go, and their base depends on it.