We must always be careful with milk, cream cheese and puddings. Bacteria can begin to form in a hurry when out in the out-door heat. Turn your cakes 'bottoms-up' for a nice flat decorating surface. Most recipes inst. The cake should ideally bake with a nicely rounded top.
Cakes can also bake lopsided when placed too close to the back oven wall.
The oven is usually hotter here and cake bakes faster where oven wall is hotter, not allowing the cake to rise as high. Bake a cake ONLY until it is done. OR it will be dry and tasteless. Box directions can only be guidelines. Large eggs can be a factor, as opposed to small.