Drupal 6.x

My Drupal 6 site has the login form at /user/login. If I'm logged in already - as any user - and I go to that URL, I'm sent to the Access Denied page (though the login URL stays the same).

I'd like to send such users somewhere else. Anywhere else. /user would be fine. Is there anything I can hook into to achieve this?

Help is no longer required.

I keep seeing the following two PHP errors in my log entries, anyone know how to fix them?

Log entry #1

Declaration of views_plugin_style_default::options() should be compatible with views_object::options() in /sites/all/modules/views/plugins/views_plugin_style_default.inc on line 24.

Log entry #2

Hi,
I have to migrate 4 sites with allmost the same theme, but with different content to drupal 7 from drupal 6 and it looks like a nightmare, and I am not yet half way true.
I add this topic to get a complete working scenario, and may be some hints or easier stepts for the next sites.

• Advisory ID: DRUPAL-SA-CONTRIB-2015-093
• Project: User Import (third-party module)
• Version: 6.x, 7.x
• Date: 2015-April-01
• Security risk: 13/25 ( Moderately Critical) AC:Basic/A:None/CI:None/II:Some/E:Theoretical/TD:All
• Vulnerability: Cross Site Request Forgery

I am trying to set up a registration code/key for my site. I know these modules (listed below) assign a code or i can assign a key to each organic group.

The issue i am having that if i select Group A but provide code for Group B it puts the registered user in both groups A & B.

I would like it to work as follows: I provide Group A code, I select Group A from dropdown and then i will be put in that group. If i provide Group A code, but select Group B it should prompt an error or vice versa.

Any suggestions would help!