Because you re actually cutting the back of your vinyl if you don t mirror your image it will end up backward.
Cutting the wrong side of iron on vinyl.
You mentioned the image is sticking to the iron so it sounds like you might be cutting the vinyl sheet wrong side down in the machine.
Tips for weeding iron on vinyl.
For iron on vinyl you want to get the mirror image it s not important unless you have text or an image you need to face a certain direction.
You can mirror your iron on vinyl in the prepare screen in cricut design space and if you select iron on vinyl as your material there will be a warning reminding you to mirror your image.
Here s the two sides of cricut everyday iron on vinyl here is the carrier side of the iron on vinyl which you can see is shiny.
This way when you weed the excess you re left with your image adhered to the plastic sheet.
And here is the vinyl side which you can see is matte not shiny.