All wrong yes.....
To start with Limewire is free, so you made some swindler happy with your money.
Perhaps you could contact your creditcard comp. for a refund ?
See :
http://www.gnutellaforums.com/showth...threadid=28751
About the difference in volume, this could be becouse the MP3 was recorded at a low volume, or there is still a setting you have overlooked.
For example :
I use Winamp and I use Irfanview, Irfan has a MP3 player and somehow the volume slider of that acts as a master for WinAmp.
So it's easy to overlook something
Futher, most burner programmes have a "normalise" option so that the volume levels are set equal.