一定是有误会了。

There must have been a ___misunderstanding.

我认为关于我从你邻居那里取钥匙的日子有误会。

I think that there is a ___misunderstanding about the day that I should pick up the keys from your neighbours.

为避免任何误会，请书面确认细节。

To avoid any ___misunderstanding, please confirm the details in writing.