Noobie with Problem- Uneven Layers front to back of bed

I am wondering if anyone can point me in the right direction for the issue i am facing with my recent prints. I am brand new to 3D printing so please forgive my ignorance if the answer is obvious. As you can see in the attached photo, i am getting thick solid layers toward the front of the bed but very thin at the back. I have leveled several times and feel like the tension on the paper between the nozzle and bed is the same on all 4 corners (and middle). Is this caused by something else? (My printer is Creality CR-10S. Printing PLA with 200-205 nozzle temp and 60-65 bed temp.)

https://lh3.googleusercontent.com/gq...w1554-h1580-no