If i am not mistaken, this is a P2P connection ie. it is transferred directly from one computer (peer) to another without a server in the middle.
Therefore files are exchanged between computers only when a connection is established meaning u only send a torrent that contains information about the download package (source,size,file etc) while the actual files are only at your computer in the beginning and nowhere else
For the second answer, its really easy actually, just befriend a mod/admin