Top bid for energy: 6687 x 4
then
Someone puts in a bid for 6800 x 4
Every time you do that you drive up the price. Simple.
What I can't understand is why someone would do that. Want to be at the front of the line? Bid 1 more crown than the last guy, though even that drives up prices.
Nonsense. That pushes prices to equilibrium faster, but doesn't change the equilibrium.