Name: Joshua Melbourne, Victoria, Australia (Zone 10a) Köppen Climate Zone Cfb
I have no idea what it is, but have you tried checking the supplier's catalogue? It might be another cultivar they offer, which would make it easy to identify. If it isn't in their catalogue, then hopefully someone here will recognise it.
That is a cheery looking lily, makes me smile. Perhaps you could contact someone from the club with a picture and request that they pass it around at their next meeting. Often club members are familiar with other members gardens.
It seems quite similar to 'Aveņu Krēms' http://www.lilijas.info/files/...
It's description says it has a creamy yellow base color and the color of the stigma matches yours: http://www.lilijas.info/Azijas... (scroll down a bit to view it)
But perhaps a bit too unlikely to be correct Davids beeing located in Latvia, although I think he ships worldwide and one could perhaps speculate a bulb ending up both here and there
It is just one stem. I guess that means one bulb, because that is what I planted, so does one bulb actually produce more than one stem after the bulb matures more?
Yes. The first photo at this link shows how a bulb divides into two parts which will produce 2 stems. Then they can keep on dividing. http://www.mikesbackyardgarden...
