AeroPod, PowerPod and Newton

No bridges. This is happening on completely different routes too. If it were a small discrepancy I won't care, but this is huge and I'm wondering if it means my power values are way off too.

I've noticed on my last few long rides that the total amount of climbing shown at the end of my rides is radically different (much lower) than what several mapping sites indicate it should be. The sites will claim 6500+ ft. and my iAero will say something like 4200. I've done several tilt calibratio...