Add user to blog and import problem

Hi

I got two issues:

1. I want to add a user to a current blog, http://smartsontestpilot.se/karl-fazer/ using:

karl-fazer null username2 userpass3 useremail2@domain.com editor

2011-04-05 08:10:54 - User: username2 created!
2011-04-05 08:10:54 - Unable to add user username2 to blog smartsontestpilot.se/karl-fazer/

I seems like the user cannot be added to the blog and I cannot figure out why

2. Import problem
We import a lot of users and sometimes the user already exists.

Username: martin@smartson.se
Useremail: martin@smartson.se

Then the users changes his email:

Username: martin@smartson.se
Useremail: mhellgrenmartin@hotmail.com

When I try to import:
Username: martin@smartson.se
Useremail: martin@smartson.se

the import process will fail and i have to find the post that caused the error, remove from the file and than do the import process over again.

My suggestion is that the plugin-in should just skip posts that causes error and then present the posts that has not been imported in a seprate error file.

Regards
Martin