Before anything, check these two things when importing a file from outside software:

Make sure your geometry is the correct size. In CorelDraw, this can be done by window selecting your artwork and looking in the top left corner at the dimensions in the toolbar.

If you need to adjust the overall size of your artwork and want it to remain proportionate, make sure the padlock icon is set to the locked position when entering a value. It can be toggled by clicking the icon.

Check to make sure you have no duplicate geometry underneath your intended cut lines. This can be done by selecting any given line and deleting it to see whether there is a duplicate underneath. Edit>Undo to reverse the delete action if there is none.

If you have duplicate lines underneath each other, the laser will cut those lines twice, which can be a fire hazard or damaging to the parts you are cutting.