Hi people,

I used the table rate module to simulate the Australia post Express courier shipping. I just set up the table rate shipping module for a different price for each total order weight value.
Its rough but it works ok; however when I add 83 items to the cart the shipping weight cost doubles. It seems to double the number of shipping boxes and the weight. Order 82 items of any one product and the problem isn't there. It doesn't matter what weight the product is, its always at 82 items where the change over occurs.

Does anyone have any idea what this could be?

I'm using zencart 1.3.7, table rate module. I also use the AUSTPOST module in conjuction with it but there doesn't appear to be a problem with that.