C&Ped from Manhattan’s post in General Questions:
If one is posting a message while the board is slowing down in preparation of an outage, often times one gets a “time-out” or other indication that the post did not go through.
It did. It will. It always does. Please do not re-submit posts to the board. Sometimes the message will not appear until someone else has posted, but it will post. Please do not repost a message until someone else has posted to a thread.
Cleaning up multi-posts is a time consuming venture.