RealTemp gets temperature info from CPU's thermal sensor that shows distance remaining to TJ (temperature at which thermal throttling gets enabled). Not from motherboard sensors or stuff like that.
That means just one thing - your motherboard is very, very good. On most motherboards, they show different temperatures.
Can't see 5.5 lb happening with Li-Ion having 115 watt-hours per 1 pound.
Even if that bike would be made just of batteries, it would have just 650 watt-hours.. it'd drain battery in a hour with less than 1 horsepower of output.
Do you use hibernation?
If yes, well - it's a known bug. After unlocking LFS, shut down your PC completely instead of hibernating, then start it again. Now your unlock should be kept forever