Ursula, I agree with you on all accounts.
This lily
is from my seed - Prawn Tiger x L. maculatum var. wilsonii. The stem bulbils are also a trait from Prawn Tiger. Name it whatever you like. The seed is from me, but you are the one who grew them.
But since the other
came from a different seed tray and especially because you grew many like it (and I had none like it), then it is not from the same cross. I think that seed it must have come from Buggycrazy, too. I recorded the seed I had sent you, and no other seeds I gave you could produce that kind of a lily.