Any dispatcher who does not wish to countersign a loadsheet either does not know if the aircraft is loaded correctly and therefore is risking the safety of all on board or is unable to accept the responibility the position requires and should not be in the job in the first place.
Funny how the DFT havn't pulled us up over that.
I think what you are refering to is the LIR or Loadplan. This details how the load is loaded onto the aircraft. Yes the weight in each hold must tally with that on the Loadsheet but the loadsheet is only to be signed by the person who created it and the captain.
I have
NEVER been asked to sign a loadsheet that I have not created and I will continue to do my job this way. If the loadsheet is wrong, you dont spot it and things go tits up, your name will be on that loadsheet.