Hello Peter, as far as I am aware, there is an automatic spam filter on the site that occasionally gets it wrong, and nukes a valid post.
This would, I assume, be based on key words or phrases that match a spam alert condition.
I can only suggest, when making posts, keep a copy, so that you don't have to re-write it all over again, lest this does happen again. Annoying, it got me once, for over a year, I have not had to sign in, I must be on a trusted posters list of some sort. I now sign in with facebook, it gets around the spam filter, and it links here with there. I thought it would be of benefit.
