CSRF1:
This should have a CSRF token

CSRF2:
Only checks if the length of the CSRF token is correct

CSRF3:
The CSRF token is the userID

CSRF4: 
Only checks that the token is not empty 

CSRF5: 
The system only checks if what you submitted is part of the CSRF token. 
This means that if you only submit "1" you have a good chance of randomly guessing a possible token.