two problems...
 

i've noticed a very annoying habit of xolox is that when a download gets to about 98-99% complete it drops the number of users i'm downloading from, from 20 to about 1 or 2. this often means a download that was seconds away from completion bounces back up to minutes, and occasionally fails alltogether.

i've also noticed that a lot of time when i close xolox it throws up and error message i can't get rid of. because i can't get rid of it if i want to turn xolox on again, i have to restart my PC. but because the error message won't obey the "end task" prompt at the restart i end up having to turn the power on and off, which ****es off me and my cable modem.

anyone know why these things keep happening?

Well, think about it: If you're downloading from 20 people, you're downloading 20 seperate segments. As segments complete, you're going to lose connection to those machines - leaving the slower ones to complete last (though your machine might be trying to further segment the remaining portion and re-connect to some of those fast connections). So, it's perfectly normal.