Here is an image that illustrates how to write a D.S. al Coda in Notion 6 and have it repeat back to the segno after the 2nd ending. If you continue to have an issue, you may want to submit a support ticket by logging into your my.presonus.com account. You can then use the "Support" button to submit a ticket. Make sure that you attach a score as an example if you submit a ticket.
As for the /cut... and ...cut/, these are used for manually entering cuts into your score. Once you have added a cut, you can hide cuts by going to View>Hide Cuts.