Hello,
Please let us know, from which version did you updated to the current version as many major changes has been made in between the updates.
The issue is has not been found in our latest version as well.
Regarding your query to have the number of days of the trip instead of the specific dates, we already have such feature. For the clarification, please see the screen record given below:
https://www.loom.com/share/ee2a6b3961c949808514dd5b56ced2ff
Hope this clears the confusion.
If you have further query, let us know.
Thank you.