Total rubbish! You can enter and leave at any Airport or land crossing that you want to.
No, that's about 20 years out of date.
I wish Google would delete out of date rubbish...
There is still comment on there that you have to surrender your mobile phone and fax machine(!) on arrival...
At least on TA and TT the information is utd and correct
You can enter and leave at different airports, so don't worry
You don't even need to leave via an airport, can go overland.