make sure they have extra calcium in the form of oyster shell laying that many eggs in a day they can get depleated pretty easy. Put the oyster shell close to their feed bowl but not in it. Since she has just started to lay hopefully her body will regulate and she'll begin to lay 1 a day like...
Nope, that is not normal . I have had Muscovy since 2004 and have never had any of them give me more than 1 egg each a day when they are laying, are you sure you didn't just miss them they are really good at hiding them.
:welcome