Windows Live Mail doesn’t honor the default account

Split from this thread.

I have a problem in that Windows Live doesn't seem to honor the default account.  I have three accounts, and when I create a new message, the message goes under the account associated with the message last viewed.   This has caused me to send messages under the wrong account with content not intended to be sent under that account.  

The default account is set correctly as best I know, all the check marks and indicators are there telling me it is the correct default, but if I am not careful I will end up sending unitended messages under another account.