I think that is not whole true but a minor mistake!
Yes, the spare part is ready and able to be shipped, there is only 1 cbm, please provide us your shipping instructions ASAP. Here is the packing list for your reference. Sorry about misunderstanding. (Or, Please accept my apologies for misunderstanding)
Thank you!
If you are referring to my using the phrase "the misunderstanding" rather than just "misunderstanding", it was not a mistake. It was a rephrasing. "Misunderstanding" exists as a
noun in English, in addition to being a conjugation of the verb "misunderstand". Here is the
OED's entry:
misunderstanding,
n.
1. Failure to understand; mistaking of the meaning
of something; an instance of this, a misconception or misinterpretation.
I am in the habit of using the noun with my staff. If they do not understand my directions correctly, I will call it a "misunderstaning" rather than saying "you misunderstood". This softens the tone, and makes it less accusatory.
I hope the above explanation has cleared up any misunderstanding. :-D