The FB box was checked and I do not want my thread posted to Facebook!!
I explained this in my email to you but want everyone else reading to understand as well. :)
We do not have an FB box to check that will cause or will automatically result in the placement of your post or thread on Facebook. There are icons at the bottom of every thread if you wish to share the thread via your FB, Twitter or Pinterest page. As long as you do not click them, posting should not result in a share on your feed.