You're using the cut path tool, so it automatically adds tabs (you have it set to a minimum of 7 tabs, with 7 tabs per foot of the outline). It just doesn't show the tabs in designer, and there's no way to know exactly where they will be placed. If you want to add manual tabs, change the cut path to an assigned bit, and assign the 1/8" cutting bit (or whatever bt you desire) - then you can draw manual tabs exactly where you want them, and click the tab tool to adjust the depth/shape of the tabs.
What issues are you running into with the text?