Adobe Illustrator pathfinder tools are creating odd bumps and glitches in the divided paths

Question

I have two shapes. After using the "Divide" pathfinder option, I am left with an uneven shape. The attached image should be more clear.

Before pathfinder:

After pathfinder:

Zoomed in:

Any idea what's going on?

Answer 1

I can't replicate your issue. I have gone as far as creating the same shapes as you have.

It must have something to do with how you created those shapes...let's try something:

1. Make sure each shape is not in a group, if they are, ungroup till all shapes are by themselves.
2. Go to object > Expand Appearance or simple Expand.
3. Try to Divide again.