Another AI query

Hi all,
Here's another AI question(s). Sorry if this is not exactly where this needs to go, but I haven't gotten a response yet at PAI. ;)
I just downloaded two packages (Air France and Continental) using the auto-installer (auto mode) from Project AI. I noticed a United jet landing at DeGaulle, although that's not the airline I downloaded. Is that normal? (I did see a Continental jet parked at LaGuardia, too). How does downloading the packages affect the default AI? Does ATC "see" the PAI aircraft? Can I download as many of the airline packages as I want without creating a problem? What's the difference between downloading from the page with all of the airline logos and from the page where packages are listed in a very long list? If I want to, how do I delete the PAI stuff? Sorry for all the questions! Hope this made sense. Thanks in advance.
Here's another AI question(s). Sorry if this is not exactly where this needs to go, but I haven't gotten a response yet at PAI. ;)
I just downloaded two packages (Air France and Continental) using the auto-installer (auto mode) from Project AI. I noticed a United jet landing at DeGaulle, although that's not the airline I downloaded. Is that normal? (I did see a Continental jet parked at LaGuardia, too). How does downloading the packages affect the default AI? Does ATC "see" the PAI aircraft? Can I download as many of the airline packages as I want without creating a problem? What's the difference between downloading from the page with all of the airline logos and from the page where packages are listed in a very long list? If I want to, how do I delete the PAI stuff? Sorry for all the questions! Hope this made sense. Thanks in advance.