Oh gosh, so sorry you got another malposition! Yes, shipped eggs seem to be more likely to be malpositioned. I had two like this last year, they were shipped eggs. I only got one out successfully since I didn't notice the other one in time.
You've done the right thing making a safety hole there, so good job! These guys don't always make it, as you've already seen, but all we can do to help is make the safety hole and keep that part of the egg up higher than the rest. And hope the little one makes some progress on it's own, or at least hangs in there long enough to absorb all of it's yolk and blood vessels and then can be helped out when ready.
It's bedtime here in Sweden, but I wish you luck! Again, it's just a waiting game because we can't force the duckling to be ready to hatch faster so we can help them out. Those blood vessels and yolk have to be completely gone before it's ready to come out.