You have been pranked, someone put a 11 store eggs in there, it takes 26 hours to produce a normal egg.
The process for making an egg starts with the germinal disk, then the yolk, then the albumin, then the membrane, then the shell- the shell take awhile to make- it is possible to get one egg with tow or three yolks, it is possible depending on when you check for eggs to get one early egg and it will look like two eggs the same day. Never more then that. New layers are not good at perfect eggs, large eggs, or 'pretty' eggs (eggs will be small, some will be rough or weird shapes), also a hen will lay an egg in the same color forever- the tint will get lighter throughout the laying season, but a blue egg layer will always lay blue, a brown egg layer will always lay brown.
Also hens take a break every couple of days- some lay 5 days and take a day, some lay every other day, some will lay 14 days then take a week off... depends on the hen.
Have fun-
(conciser a game cam if you want to catch the person)