This may have been brought up before, but I cannot, for the life of me, find anything on the forums with regards to the issue I'm experiencing.
In S1, I currently have four gates at my HQ airport. I was unable to get enough planes together to get 201 flights going before the two month time period elapsed and lost my fifth gate. Currently, my HQ airport has "-2" gates available.
To get more gates, I want to build a terminal. But I can't. I get a lovely "You can build a terminal only at your own hub." message. OK, no problem. I'll designate my HQ as a hub. But I only have four gates at my HQ, and thus cannot make it a hub either.
I don't recall this being an issue in the R-worlds I've played in. Is this a S-World (or S1 specific issue)? Is this functioning "as-intended"? Shouldn't I be able to construct a terminal and designate it as a hub? Maybe there should be a gate count exception for designating HQs as hubs? Have I missed something that explains this specific issue? Could I possibly ask any more questions in this final paragraph?