When you define your template, you make a few rules under 'Time limits' and 'Availablity'.
Go to the new tab page,
Click 'Share times',
Click the three dots next to the relevant template,
Click 'edit',
Go to 'time limits' and 'availability' and check what you marked.
If you still see slots that shouldn't be open/closed, email us at hey@magical.team with screenshots of the slots and the templates setting and we'll help.