Your flights always seem to be the ones that are disastrous and as luck has it one of your "top" gold ECHs was on it (how do you determine if they are a "top" or a "bottom" ECH?).
CIV 'score' - a number from 1-100 next to the passenger's EC number on the manifest. Means "Customer Importance Value". Blues are 1-15, Silver 16-37, Gold 38-97 and then Premier 98-100.
That said, most CSDs and Pursers I have spoken to haven't a clue what it is.