-UPDATE-

Well after 2 days of playing with the shipping I figured a way out.

I just set the tare to;
0:0
and the table rate to;
1:20.00,2:25.50,3:31.00,4:36.50,5:42.00,6:47.50,7:53.00,8:58.50,9:64.00,10:69.50 ,11:75.00,12:80.50,13:86.00,14:91.50,15:97.00,16:102.50,17:108.00,18:113.50,19:1 19.00,20:124.50,21:130.00,22:135.50,23:141.00,24:146.50,25:152.00,26:157.50,27:1 63.00,28:168.50,29:174.00,30:179.50,31:185.00,32:190.50,33:196.00,34:201.50,35:2 07.00,36:2.12.50,37:218.00,38:223.50,39:229.00,40:234.50,41:240.00,42:245.50,43: 251.00,44:256.50

So I;m getting 5.50 per 454 grams, close to the 500. Good enough for me.

The flat rate was removed, I needed to incorporate the flat rate into the shipping, not have it as a seperate shipping option.

So now I get 20 for the first pound and 5.50 thereafter for every other pound.