I two of my calatheas are growing so that all the ones in the back are much taller than the ones in front. And all of the leaves are turned towards the front of the plant. I feel like it might have something to do with lighting, but I'm not sure. They're several meters away from an east-facing window. I leave the blinds up during the day so they can get light.
What should I change so they grow evenly?

They need a much brighter spot then "meters away from an east window". They need to be close to the window.
They are bending and growing tall and slim because it is trying to reach for, and get closer to, the brighter light.