Front and rear passenger side water…

I have a 2013 Impala LS (no sunroof). I have been getting water on the passenger side (both front and rear) lately when it rains. I found the rain deflector covering the cabin air filter to be off set so I thought that may solve the front leak at least. My question is, could the water from the front also soak the back? Under the seat is dry so it’s a mystery. The weatherstripping is not dry rotted or cracked or anything like that. If anyone has had similar experiences or knows of a fix, please let me know!