I use shipping rules to set up a list of different post options. I had to create two rules in order to provide free shipping for all orders within UK over £60. So I created these two rules.
Rule one: If ALL of these conditions are TRUE: Subtotal less than 60.00 Shipping Country is one of United Kingdom
Rule two: If ALL of these conditions are TRUE: Subtotal greater than or equal to 60.00 Shipping Country is one of United Kingdom
But I noticed that the shipping cost still appears on some orders with total over £60 and within the UK. I looked into it and noticed that when Grand total Excl. Tax is under £60 rule one is applied and with the shipping cost and when Grand total Excl. Tax is over £60 rule two is applied and with out the shipping cost.
What confused me the most is that it says cart subtotal when you set up rules. I wonder what could be a possible solution for such problem?