The route profit only counts expenses directly relating to that route (fuel, landing fees, etc.).
The aircraft view is the final figure, and it includes maintenance and leasing costs.
I don't know what's up with the flight number. Give it a game day, sometimes the system only resets every 24 game hours.
Just to further clarify what Rushmore said, the "aircraft view" isn't really the "final" figure it's just inclusive of more costs. Still not all of them though as it excludes overhead (all your HQ people, ground crew, marketing expenses, etc, etc). So if you add up all your Aircraft "profits" that's not
what you're actually putting in the bank every week.
The Route View gives you the costs to operate that route
. It's how much you sold in tickets, minus the fuel, minus the landing costs. That's it.
The Aircraft View gives you the costs to operate that plane
. It's the same as the Route (but includes all of them the plane flies), but also minus the pilot/attendant salaries, the lease costs, and the maintenance costs
The Income Statement gives you the costs to operate your airline
. It's the sum of all your Aircraft stats, but also minus the office rent, the marketing, the non-direct personnel salaries, the training, and any loan/tax expenses.