Hello Breezy,
Sadly nothing springs strait to my mind to explain or fix this for you

So…
Can you give any more details?
How were you’re problem stencils made?
It generally shouldn’t be an issue, but at what size are you using them and on what size canvas? i.e. how large an area of the canvas are you covering when using them?
Are you able to post any screenshots of what you are seeing?
Are you able to post any sample stencils that are misbehaving for you?
Are any of the stencils that ship with ArtRage displaying this problem?