Baaz

This happened to me on two occasions today. Both times I had picked up ore in Georgetown and attempted to sell it at two different locations for 222 / unit. Instead I was only paid at 111/unit at each location. I could understand this if the sell price dropped after I had sold my iron at 222. However, after accepting my iron at 222, and only paying out at 111, the sell price still remained 222. If the port had only wanted, say 50, at that rate, then it should be indicated; or am I expected to sell ore 1 unit at a time, and stop when I'm suddenly paid half??