I think there's a little confusion in here that's contributing to not being able to identify the breed for sure. Were these hatched four weeks after the saxony died, or were they laid four weeks after the saxony died? You've said both in this thread. I think clearing that up will help. At any rate they are very pretty and it will be cool to see what kind of offspring they throw.
I also wanted to post this in here for you to compare to. It's another member's runner/rouen cross.
Runner crosses don't always have an upright stance, especially if the breeder's runners didn't have a good stance themselves. This is a runner cross:
He doesn't stand upright.
Can you ask the breeder if they have blue fawn rouens? A spontaneous mutation can happen and is how most colors come about, but it's very rare and twice in the same hatch would be extremely unlikely.