I don't want to say "you're screwed" because I've done the same thing in a little giant.
Your biggest issue is not being able to turn the later eggs long enough.
It isn't ideal but here's what I would do.
Wait to lock down the March 6 eggs till day 19. You may be able to get them out before the March 8 eggs start pipping.
The March 16 eggs will get 10 days of turning before they aren't touched while waiting for the other 2 batches. Not ideal but better than no turning.
Turning the first 2 weeks is critical.
Don't stagger in this way again in a LG.
We haven't discussed temperature or humidity but this is a start.
