Thanks for sharing. The “d” edition Jungle Butterfree and Eevee are both caused by some filth on the 1st edition print roller causing the repeating missing circle/oval on the same location. Your 1st edition stamp on the other hand seems to have some white ink on top of the 1st edition stamp.
We’ve theorized before that the ‘black back imprinted stamps’ and some of the ‘grey stamps’ might be caused by uncut sheets being stacked before the ink of the 1st edition stamp had properly dried.
I still don’t really know where the white ink of the ‘white back imprinted stamps’ and your smudged 1st edition stamp comes in play, though. Not sure where they’d need white ink for during the 1st edition stamping process. 
But cool to see that the white ink of your back imprinted stamp can also be seen on the actual 1st edition stamp on the front. 
Won’t be anytime soon, but I’ll add your copy to both this article and my 1st edition stamps article eventually.
Greetz,
Quuador