Sleep is a hybrid mode of the old "Standby" and "Hibernation". After a certain amount of time in Standby, the OS will make a determination, based on several factors, as to whether to actually hibernate the computer.
Part 1.
When the computer is in standby mode -- power is still going to the RAM.
When it is in hibernation, the entire contents of your RAM modules are stored to a file on the primary hard drive and then reloaded when you turn the computer back on (this is also known as a system state restore). No power is used in hibernation mode.
Part 2.
What you need to do, in order to prevent the "Resuming Windows..." is turn off hibernation. This can be done in the advanced section of Power Options in the control panel. Take a look around a bit, and if you can't find it let me know. I will try to post a screen shot or two to show you exactly what you are looking for.
If you can understand that hibernation and standby are two seperate things, now combined into one as "Sleep Mode", you will see that this is what is happening. First, the computer is going into standby, then after a certain duration of time it decides, ok, GoTTi isn't coming back for awhile - go into hibernation to save power.