So I got one of the "refund notice" emails today:

Due to reasons which are beyond our control, we are sorry to let you know
that $4 have been removed from your earnings as result of a refund for
file ID_________.

This isn't the first time I've been hit with one of these, but this one troubles me because of the amount.

I don't understand why they have removed $4 from my account when I was only paid $3.90 for the sale in question.   .10 isn't a huge deal but it just doesn't seem right.

Any thoughts?