I had a 9 watt increase after testing, trained for three weeks improving most PL’s upwards, then manually adjusted up 1 watt for symmetry and a few of my PL’s nosedived, 
I’m kind of bummed that after I completed 23 out of 25 intervals on a PL 4.1 Anaerobic workout that my Anaerobic PL stays at 1.0, I couldn’t even warrant a 2.0 or something? Earlier in the year I completed 85% of the intervals on a PL 6.4 Sprint workout and got…1.0 for my Sprint PL 
Not even a 1.5 for getting close? Guess that only counts in horseshoes!