The blog software has problems with displaying too many comments on one page, so after a certain point you need to look down at the bottom of the page where you'll see a link labeled "Load More." If you don't know where to look for that then you might get the impression your post has been deleted, which is what I've recently been accused of. I never delete legitimate comments (i.e. anything other than obvious spam or something outrageously inappropriate) even if the commenter disagrees with me. So if you can't find your post, check out the "Load More" link at the very bottom of the page.
To avoid future problems of this sort I keep adding new open threads. Here's no. 4.