Batch Create accidentally adds superadmins as users to newly created child blogs

I am using your plugin batch create to make child blogs and to add existing users of my WPMU install to these child blogs. The problem is that I do not have the passwords of most of my users because they are auto-added by using an LDAP plugin. So I use your spreadsheet and fillout all I can, but if the password field is left blank, errors occur. It will process the log, create the sites but it will not add existing users without a password listed. Instead, it adds me (the superadmin who did the bulk upload) as a user to every child blog that had an existing user listed (but no password). See attached. How can I add existing users to new blogs with this plugin if I don't have access to their password? Thanks!