Hi,
Well the latest version of JoomSEF has been released just a few days ago, so new version will probably be released in a few weeks.
As regards the MyBlog issues - what version of MyBlog component do you have installed? I've just tested the MyBlog extension for JoomSEF with version 3.0.332 and it seems that problems 2. and 3. should be fixed in new version of the extension, but I haven't seen a problem 1. described by you, so maybe you use different version of MyBlog component?
Best regards,
ARTIO Support Team