Q: 我砍單要給他理由or not??
A: Of course not!!! You don't need an excuse to cancel. Just do it.

Q: 要不要等確認後再重新下單比較保險??
怕買到兩份"攤成本"...ccc
A: Well, it is better to wait until the cancellation is confirmed then re-order again. The price is not changing all the time, so you should wait.