A few users may have lose their profile pictures as well, as they were tied to the site profile. We've eliminated that entire backend to speed up the website loading (down a plugin, and an entire extra profile).

You can reapply the profile pictures now

There is often a long delay before I can see the posts from users whom I assume are guests after they are listed under "last post" in the forum. For example, Maw supposedly posted something yesterday that I still cannot see, and Melanie just posted something in the thread about my routine but it isn't visible yet. Is this wait to allow a moderator to approve the guest post?

I'm seeing the same thing.

When a guest creates posts or threads in the forum, you are able to see that they have done so on the main page of this site without the post actually being visible in the forum. Then when their post actually does come through, it doesn't bump the thread it was made in, or it doesn't rise to the top if it was a brand new thread. There is a chance that good posts from guests can be lost this way. I'm wondering if there isn't a better way to do things.

Is there a way to make threads/posts from guests bump to the top when they are made visible, and not when they are submitted?

We're working on fixing this now!