LTPPI non-inverted output distorted trash, fine on inverted output

[ELS122]

I am troubleshooting my amp and I have problems with fizzy distortion, I connected my signal tracer that I have going into my PC sound card and I have a scope program running, and found that the signal is fine on the inverted output of the PI, but trash on the non-inverted (cathode driven) side...
I have scoped the signal on the grid, and if I crank the gain I get some AC there, nothing nice, but that might be just random capacitance leaking, or the ESR of the capacitor letting some of the signal trough. but nothing really alarming I think.

I have attached the scope screenshots of the outputs of the PI, I didn't have a signal generator I just played one note on the guitar 
and also the schematic of the output stage of the amplifier...

I scoped the power rail and there's no signal there.
the amp has no NFBL

[ELS122]

I used an online signal generator (at 440Hz) and messured the PI input and output waveforms.
I also disconected the PI plates, so there was nothing connected to the PI.
I still got a shitty waveform on the cathode driven (non-inverting) side, but a descent one on the inverting side...

I attached images of my readings:
(I gain matched the input signal, but the non-inverting and inverting outputs were captures with the same gain setting)

and yes I've tried swapping tubes, tried 3 tubes, all have the same problem.

this only happens when the PI is overdriven, when clean, it outputs a nice sinewave on both outputs.