Closed threads are more likely "moved" threads, but it seems this particualr board does not have support for the "moved" thread like others do. Frequently, you have to hunt down the location of the new location. A bit of a pain if you ask me,
You can edit your posts. People in this group seem to like to do lots of post editing, even removing an entire post of some bit of information is a little wrong. A bit weird, IMHO. It makes it hard to follow a thread.