Consumer GPS devices are not accurate enough to resolve altitude differences this small. Depending on the satellite signals, your reading can be off by as much as 100 feet.

My GPS has read as low as -18 and as high as 10 when driving past Redwood Shores on the Peninsula.

"To therob"

Yes, it's Andy...
But keep in mind, I spotted Ivan & Roger up the same obstacle on exactly the same line as I was spotting you & they both made it up with little problem...WoW, they never broke anything!!!

So if you want to blame me for faulty spotting, that's fine...But stepping on the gas too hard, which caused you to bounce sideways 3 feet, while attempting that obstacle was pretty stupid, as you mentioned to me after you broke your rim!!!

Next time I'll just stay in my X and you can spot yourself...

PS: You previously mentioned you've done worse??? Maybe it's your driving that breaks things...Not The People Kind Enough To Spot You!!!
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Must have been low tide.