I'm gonna chime in here -
#1 - I'm gonna guess Leuco was one of the main parents. The other plant was probably a mutt which included flava. I don't see the purp hcarlton sees in it, but I don't have much experience with purp hybrids.
#2 - Johnny is probably correct that this is 'Lady Bug.' It definitely has S. minor as the major parent with a S. psit influence on the other side, however, it opens up more than the hybrids between just those two, so I'd say that the parentage of S. 'Lady Bug' looks correct to me, especially with its squat features.
#3 - I wonder about purpurea montana here. The lid closes more than any straight venosa I've seen, or that appear in Schnell's 2002 book. However, I'm not confident about that since purpurea is such a variable plant. Perhaps, you could give us more information about where you obtained these plants and our Aussie friends could chime in as well. If it's TCed, my bet is both of the above are correct and it's venosa, albeit different from the ones I've seen here in the States.