Duplicate user names

Hi,

I seem to have managed to create two users with the same user name !
1/ Menu User, Create user 'bob', who is not a resource
2/ Menu Resource, create resource Bob, check "is a user", username = 'bob'
=> user 'bob' can be created a second time !

I've also noticed a second issue, but I'm not sure if it's related to our use of LDAP of related to Projeqtor:
- If 'tim' is a user connecting from LDAP, he logs in as username = 'tim' with his Ldap password
- If he logs in as 'tim*' with the correct Ldap password, he is correctly authenticated, and a new user 'tim*' is created.

Definitely not blocking but perhaps to check for small improvements.
Cheers.