Just a guess. It is because you sent them together. If you had just sent Maine, it might have gone straight through as a stand alone state return. Since you sent them together, they will stay together until the fed is released. https://proconnect.intuit.com/community/individual/help/ef-atlas-federal-state-ef-method-standalone-...

 

This ^^^
Same thing would happen with CA, if I send them together, the CA will be held until the Fed is accepted or rejected (if fed is rejected, state will reject too) but if I send CA alone, its not dependent on the fed at all.