How do you overclock, Pops?
Do you use a Windows tuning utility?
Do you use an "automatic" overclocking feature of the BIOS?
Or . . . do you set the parameters for voltage, speed, LLC and other features manually in the Advanced BIOS screens?
I can only speak from my experience with Z68 and Z77 motherboards. There were four ways to overclock: (1) you could flip a switch on the motherboard; (2) you could use the "AI Tweaker" or overclocker within the BIOS; (3) you could use the bundled proprietary tuning software in Windows; or (4) you could manually set and adjust settings in the BIOS menus. Whichever method was last used would give you the effective settings. Some other boards or BIOS's might not follow that logic exactly.
But there would be confusion when using the Windows software -- as I remember it. Also, there should be a "save" button in the tuning dialog of such software.
And of course, every time you change settings in the BIOS, you need to "save" the changes.
Please do not be irritated for my discussion of these rather simple matters, but there's always the possibility that there is some relevance to your current problem situation.
By the way. Using the Offset settings will help you reduce voltage and therefore temperatures, and there should be an Adaptive voltage setting on top of that. The second setting would allow you to keep the Offset as low as possible in the positive range.
If you want to reduce temperatures under idle conditions, you should Enable EIST and C1E among other things.