System Message - Duplicated earnings issue from Nuffnang

I seldom have message from Nuffnang. Today check my gmail and find out a Nuffnang with title duplicated earnings? Where is the duplicated part? I have really no idea. Anyone have the same email received?

Dear Nuffnanger,

Due to a system error, your global CPC earnings for the week of 14th-20th November were duplicated when the earnings were credited yesterday (25th November). You are receiving this email because your account was affected.

We have made the necessary adjustments to our system and you may find that your displayed earnings will be slightly different from the 25th of November due to this.

We apologize for this error and any inconvenience caused to you. Thank you for bearing with us.