1) I've had over 5 devices running on my internet at once, and I 4 barred on every host, including mine. (My PS3, Moms Laptop, Stepdad's Laptop, Sister's Laptop, Sister's BF's laptop).
2) I do 4 Bar every time I host, all other players 1 bar.
3) Does the torrent program upload things by itself? Because me nor my sister's bf upload anything via torrent manually.
1.) try to deactivate or just dissconnect anything that is not being used. I.E if a computor is not being used then disconnect the Ethernet cable, if your not using the laptop turn the wireless switch to off.
2.) Ok then you must have most

3.) yea if you still have the files in the orignal folder or area were it was put & the program is open the it uploads it so other peoples download goes faster. Thats how the whole seeds & peers work. I believe the more peers the faster especially if the seed number is small. If the seed number is big & the peer number is small then basically your going to have to do this over night or when you have alot of time that does not use internet.