Yes if a daylily is converted then there is 2 versions of the same flower. And yes it can be sold as TET xxxxx it just can't be registered.
The flowers generally look the same, but usually bigger than the dip version. I have heard that the tet conversions have shorter scapes than the dip but not 100% sure if that is true or not.
Yes the offspring would have double the chromosome just like the conversion does.
