Perhaps you guys remember I used to be the former mod here.
As for appeals, send a PM to Doc explaining why you think you should not have received an infractions or warning. He might respond specifically stating what/why/etc more in depth.
However, first, I suggest you refresh yourself about the guidelines for this board.
https://www.eccie.net/announcement.php?f=5
You will most likely find that although the warning or infraction system auto response might not be specifically clear, if you read the various guidelines (the entire paragraph for each), you will most likely conclude that you did deserve what you received.
To close, frankly, Doc is a bit lighter on issuing infractions than I ever was.
As for staff not issuing an infraction for something similar previously, just consider yourselves lucky it was missed.