^^ I'll second that. Reminds me of something like a mode hopping DPSS, but still those spikes are unrealistic IMO. Maybe WL just has crap LPM's. Actually, scratch that maybe..
It's more like the LPM is digital and has very low resolution .. like it can measure only 6 values. In such case such 'hopping' would be normal.
But why has LPM such low resolution is beyond me.