I have got a column called 'Mugs' - I have got 2 types of postage Basic and With Mug. The Basic one is £2.50 and the With Mug one is £5. I have just tried it out and what happens is if I add a mug to the order I get the Basic PLUS the With Mug postage both coming up. I just wanted one or the other. Do I need some other condition in the Triggers for that to happen?