I've never heard of any breeds that specifically lay more than 1 egg per day but some folks claim they have gotten 2 eggs in one day from a hen?!?! I've had chickens for a very long time and even used "trap nesting" for about a decade for an egg production project I was conducting and NEVER had a hen lay 2 eggs in the same day during that 10 year long project! However, my study was with one breed, Buckeyes.
well i had my 2 slikie hens in a small pen & in 1 day i got 3 eggs
there were only 2 hens in there & no way any others got in to lay that extra egg
i had just put them in there so there were no eggs from days earlier
don't shoot the messenger folks but i'm telling you straight here they CAN lay more than 1 egg in a day
if i hadn't seen it myself i wouldn't think it was true either