Ok so I've patched this for now, I think... the reason I'm calling it a patch and not a fix is I have yet to track down the real reason why this is happening. I kinda just covered up the issue so that it works again, without fixing the root cause. Additionally, lets say you leave a whole lot of extra time between flights, and your last leg departs THREE days after initial departure... I think this issue would show up again. This is the reason I had a 1 hour "extra time" limit between flights, to prevent routes that went on for multiple days on end.
I am the developer of Airline Enterprise