If you haven't noticed, Blockland now says:
Powered by SMF 1.1.5 | SMF © 2006-2008, Simple Machines LLC
Instead of:
Powered by SMF 1.0.8 | © 2001-2005, Lewis Media. All Rights Reserved.
Among other features include the ability to prune and search your personal messages, set custom labels for personal messages and an
ignore list for personal messages.
This is why you had to enter your password for a second time.