Base dish and top dush?

[Redfox]

I am making an Italian love cake. I am confused by this statement and why are two dishes needed.

Grease a 5cm-deep, 16cm x 21cm (base) and 21cm x 26.5cm (top) baking dish.

Here are the directions

Preheat oven to 180C/160C fan-forced. Grease a 5cm-deep, 16cm x 21cm (base) and 21cm x 26.5cm (top) baking dish.
Step 2
Whisk cake mix, 2 eggs, 3/4 cup water and oil in a bowl for 1 minute or until combined. Pour mixture into prepared dish.
Step 3
Whisk ricotta, remaining eggs, sugar and vanilla in a separate bowl. Spoon over the centre of cake batter leaving a 1cm border (see notes). Bake for 1 hour to 1 hour 10 minutes or until cake is just firm to touch. Cool for 2 hours.

 

[Norcalbaker59]

Reading the instructions, I would conclude the recipe poster made an error by indicating two baking pans. There’s no use for a second pan.