Removing a date from date split

Hi im building a hotel room booking engine.

im using air date picker and date split plugin.

Its nice when i can do day calc from end date vs start date. Jul 4 to jul 5 correctly showing 1 night difference.

But when it landed on my calendar, it landed on both 4th and 5th. I check in date split db, seems both 4th and 5th included in db.

It is not ideal. It suppose to land on checkin date only, the 4th.

Is there a way i can remove the last date? Or any other clever workaround?