I have two examples, both of which have happened in the last two days. I’ve since had to fix them so they displayed correctly, but here are the links:
https://www.cinemasight.com/this-day-in-oscar-history-december-14-2012/
https://www.cinemasight.com/this-day-in-oscar-history-december-13-2012/
The top parts of these threads, where the images are, is saved and scheduled with the center tags surrounding them. After they had been posted, I noticed the tags had been removed.
https://www.cinemasight.com/poll-best-actor-2003-2007/
https://www.cinemasight.com/poll-what-are-you-watching-dec-14-16-2012/
Both of these polls have the poll code as you see it now when I scheduled them. After they went live, half the code was missing from them.
I won’t have another one to post until Sunday, so I can’t say for sure if it will be a problem on these latter two links. On the former two, the next one posts in the morning. I’ve examined the code in the currently-scheduled post and the center tags are there. If they are stripped out when it posts in the morning, that will be the third day in a row it’s happened.