Overlapping Outputs on 32x32 LED Matrix

I’ve been working with a 32x32 LED Matrix, for one of my college projects. I’ve been testing some of the demo code you used in the repo. However, the output is duplicated thrice for some reason. I am quite new to using these LED matrices, so I am not quite sure what I should do.

Here is the command I put in:
sudo ./demo -D0 --led-no-hardware-pulse --led-cols=32 --led-rows=32

My output looks something like this: