Usually that means that your drawing has two copies of each line on top of each other.
You can test that by trying to plot one of our example files, to verify that this isn’t an issue with your Eggbot or your software setup.
You might try selecting one of your paths and deleting it, to see if there’s a second copy underneath. If you’re still having trouble, please contact technical support directly — you could send us one of your files, and we can help figure out what to do about it.