Do you have two different calendars for adding events and for checking the conflicts?
Yess doesn't restrict you anywhere! You can choose different calendars for different purposes.
- Go to - Availabilityand you will see the below-highlighted sections.- OR 
- Click on edit beside any of the sections (either - Check these for conflictsor- Add events to this)
- You will see this kind of pop-up and there you can select the preferred calendar. 
Understand more and better from the below-related articles.



