Mystery of the leaves

I'm have a bit of a puzzling situation at my rented house. I frequently find some fallen leaves on my porch. This in itself is not really a problem. The thing is, the leaves look like this.

The front of my house looks like this.

There are no trees near enough that could drop leaves directly onto my porch. The nearest trees are the one on the left.

 And the leaves of those trees look like this.

Both of which look nothing like these leaves.

So the question is... where the heck are these leaves coming from?

The only logical answer is someone is throwing them in. But why would anyone do that on a regular  basis? And how do they get all the way from my gate to the front of the house, which is where most of them end up? And some of them even get under my dog's shelter area.

This is going to drive me crazy for a while.

Mystery of the leaves