John:

There should never be a manual entry to Retained Earnings.

Was the other side of this entry to a Balance Sheet account or an Income account? If an income account then that likely explains the double up (an income account will be closed to retained earnings).

Did you post this to the current year, prior year, or next year?

Most likely your best course of action is to unpost this entry and post it correctly. What is correctly? We will need more information and this may not be something you want to post on an open forum.