Network Manager

I have to connect to WPA2 enterprise wireless routers at school. I have a preferred networks entry with all the info stored. I also have to use a VPN client in order to access the school network and internet. One day it just stopped working. I appeared to be connected, but the VPN wouldn't work. No error message or any indication that I wasn't actually connected. I had full signal strength indiction from the top bar and the network drop-down menu had my router checked. After weeks of this, I discovered that I wasn't actually connected. I had a password change, but got no feedback while connecting that my password was no longer being accepted.

That was pretty frustrating, but what is really killing me is that I have to manually change this every time I want to connect. I saw another post that recommend to someone to delete the preferred network entry, delete the keychain entry of the login, and re-create a preffered network entry. I did this and rebooted to no avail. My old password for this network is being pulled from somewhere and the network manager just won't let it go. In fact, even though I only touched specific entries for this paticular login, now my macbook will no longer connect to my router at home. So, ...

1. Please fix this behaviour in a future patch. The lack of indication that I'm not realy connected and the non-saving of the new password. I don't think I'm the only one with this problem.
2. It seems passwords are being stored in a location other than my keychain and it isn't in RAM. If this is true, what's the point of the keychain and what file to I have to edit to get rid of this old password?