Two accounts

Q: How do I sign on to my 2nd Google account?
A: There is always some confusion when a blogger has 2 accounts. It is not just the owner of these accounts being confused. Often the computer is also confused. To avoid problems like this, it is usually recommended to clear cache and cookies:

http://www.google.com/support/blogger/bin/answer.py?answer=92458&topic=12449
Sign off from everything Google and sign back on again: www.blogger.com

This time, starting with a clean slade, use a different browser for the 2nd account. Either that or use 2 computers; one for each account.

source: http://www.google.com/support/forum/p/blogger/thread?fid=2817796c59dd52dd0004a4745ad49e82&hl=en