Bug Fix Ferry Planner

I need a programmer to fix an error in calculation for my Ferry Planner project. The fix is quite urgent and needs to be completed within the new t day or as soon as possible.

Summary: Prev button uses ArriveBefore mode and next button uses LeaveAfter mode in api.

The way the script was originally written resulted in the below times.

When you press the next button, it displays in order of departure time. When you press the previous button, it reverted to sorting by the arrival time. For example:

Russell Island to Redland Bay Weedays using original tool with “previous button”
Next => Depart 4.35pm – Arriving 5.06pm
Next => Depart 5.10pm - Arriving 5.41pm
Next => Depart 5.15pm – Arriving 5.35pm
Next => Depart 5.25pm – Arriving 5.56pm
Pre=> Depart 5.10pm - Arriving 5.41pm
Pre=> Depart 5.15pm - Arriving 5.35pm
Pre=> Depart 4.35pm – Arriving 5.06pm

Ideal Skills and Experience:
- Experience in the programming language used for the Ferry Planner (Python, JavaScript, or Java)
- Very Proficient in debugging and troubleshooting code
- Able to work quickly and efficiently under tight deadlines