How many eggs?

Do chickens ever lay more than one egg a day?
I've had 4 POL hybrids for a month or so and regularly get 3 eggs a day. One has been off lay for 3 1/2 weeks. Today I get 5 eggs! They've been locked in their fixed run all day so I know none were from yesterday daytime.
I put them to bed about 5pm last night after dark, and I picked up 2 of the 5 eggs at 8am this morning. Could those 2 have been from last night, or could one or more birds have laid 2 eggs today?

I've had all sorts of weird laying when they're getting settled into it. The one off lay may have laid last night and again this morning.
I deliberately got hens that lay different coloured eggs so I know who's doing what!!!!

After noticing I was getting 3 eggs and/or double yolkers from 2 Speckledies on a number of occasions last month (the pullets came in to lay 2I Sept) my B/Day, I decided to keep a record (1 of them is laying an extra tea time egg and 1 of them is laying a larger egg).

1  Nov  3     9  Nov  2
2         2    10        2
3         3    11        2
4         2    12        2
5         1    13        2
6         3    14        2
7         1    15        1
8         2    16        2