1) If the order of install messed me up? I put GSX, then CYVR then addon manager (I believe)
The installation order doesn't matter. If your CYVR installer is quite old, is best install the Addon Manager last, if it's fairly recent, it doesn't matter, if GSX installer is outdated, you might want to download the Vehicles updates, but just to get additional vehicles, because the program code is always updated automatically.
Lost the terminal
It's not clear if you lose just ONE terminal, or all buildings in the airport.
Can't get GSX to call up now either, in YVR or another test airport.
Do you have BOTH the Addon Manager and the Couatl powered products menu ? If yes, do you have the GSX Settings menu ? If yes, the problem might just be a key conflict with another add-on so, you should check the "Key mappings" menu under the Couatl menu and check you don't have any conflicts there and those keys do not conflict with another FSX add-on.
If no, please indicate exactly what you are missing, menus and what scenery items are missing.