fixed it
It took me a while to find the solution for this, but finally I got rid of this annoying behavior.
I am very new to windows 7...
I right clicked the desktop looking for the familiar properties option to get to display settings... and chose personalize.
In the lower right hand side I selected "Screen Saver". Under the Power management section, I selected "Change power settings". I have a Dell, so by default the Dell plan was selected, I changed it to High performance, and then clicked on "Change plan settings".
I selected "Change advanced power settings", and then clicked on "Change settings that are currently unavailable". This allowed me to change the Require a password on wakeup option to No. I then selected Ok and Save changes.
I no longer get the user screen when my pc wakes up from sleeping.
Someone else posted a similar solution and you mentioned that you had already tried that; I'm not sure if this is the same option or not, the other poster mentioned checking "Don't require" and the option with this method was "No"...
I hope this helps, it worked for me.
-drumbokas
edit: my user account does not require a password, and I have a guest account that is off.