Thanks zorzyk. Your data made fixing this problem possible.

I believe that your coolest core is in the proper position and is being displayed as core3 in your screen shot. Do you remember if core3 is always the coolest when the core order shows as 0-1-2-3?

You might want to post a CoreTemp / RealTemp comparison to show how the competition handles this problem.

There is also an item you can add to the INI file if you don't like the way RealTemp is ordering your cores.

DisableQuadBugFix=1

will turn off this feature. That item will probably make it into the Settings window for easier comparisons.