Registered users must now verify their email address prior to posting a comment. Pre-moderation is always enabled for guest comments.From the Disqus website here is more information about that:
Why is verification important?
- Verification is required for all Disqus forums - If your account is not registered, you won't be able to post a comment as a registered user! If you have an unverified account, you'll only be able to comment as a guest, which is an option offered by some, but not all forums.
- No impersonators - Verifying your email prevents others from using your email address when posting on sites using Disqus.
- Fewer trolls and spammers in the discussions you love - Requiring email verification makes it harder for trolls and spammers to create accounts with fake email addresses.
I don't know if this is the source of the problem. If it is, then it seems that by registering with Disqus by verifying your account will avoid your comments being automatically being placed in moderation.
I hope this helps. And once again, thank you for your patience.