Must be a rounding issue with the display of the slots remaining. I'll see if I can fix it.
Edit: Not sure if I necessarily "fixed" anything, but I did change it to display out to 2 decimal places. You were actually short by -0.05 slots, but the display was rounding that to 0.
Edit: Not sure if I necessarily "fixed" anything, but I did change it to display out to 2 decimal places. You were actually short by -0.05 slots, but the display was rounding that to 0.
I am the developer of Airline Enterprise