Hi,
I also noticed that my 1st class recorded large letter pricing for 190g comes out as £2.10 when it is supposed to be £1.40. I have these shipping rates:

0.1:1.18


0.25:1.40


0.5:1.68


0.75:2.12

This is because 70p is added automatically as insurance. Can I just set 0:25 to 0.70, that way when the 70p is added, the total will equal £1.40?