Why is there a white outline on sections of my CutCountour

Sent my artwork to CJ500 converted to SC500 using ColorChoice.

Thought we were finally going to have success but of course we ran into a new snag. When weeding there is a small white edge on parts of artwork (not all the way around). The CutContour is set the same around everything. Checked the blade settings/test all looks fine. Can anyone help me understand why the media would show around only some of the letter?