Blueberry cobbler cake.

I cook for my church every Wednesday night. Have been doing this for about 14 years. Here is one of their favorites. Blueberry cobbler cake.
2 boxes yellow cake mix
2 cans of blueberry pie filling
6 eggs
2 cups water
1 cup cooking oil
2 cans cream cheese frosting
1 tub fresh blueberries.
Prepare the cake mix according to directions on box
And pour into a large steam table sized pan. Drop by spoonfuls 1 can of blueberry filling into batter and bake at 350 degrees. Cake is done when it springs back to the touch. Blueberry filling sinks to bottom of pan as cake bakes. Allow cake to cool and spread second can of blueberry filling on top. Spread frosting on top of that and sprinkle fresh blueberries on top.