Much like Mayo, I can only give an opinion based on my experience, and I have none concerning Stippled Statement. I use to grow Arrayed In Splendor (Bell, 2002) which was an edged pink that was stippled even though that was not mentioned in the registration description, so I know there were other stippled daylilies available. It is impossible to know how many other stippled ones might be out there in which the registration never mentioned that feature. However, if your friend did not grow any other stippled flowers and that is where the majority of your seeds from that time period came from, a deduction to the one she did grow is certainly logical.
Concerning Alexa Kathryn, I did grow that one for several years. I didn't have much luck with it although it was often referred to as a "hybridizer's flower" because the blooms often did not fully open and/or all of the petals never flattened out. With that said, your third and fifth pictures look so much like many of the blooms I had on AK in terms of petals that never got to the shape/form that they show in your fourth photo that I could see a very strongly possibility that AK was a parent.
