It turns out that the WMA compression we do on the audio data to make the file shorter ALSO performs an AUDIO compression. This was not known when we wrote the Comp/Lim module for Hoster.
The changes we made were to make the defaults equal the manual.
The manual warns to test the compressor/limitor on some songs to determine the settings you like. Comp/Lim is a very complex issue. Some users disable it altogether to make importing faster, and because they don't know what it does.
Listen to some of your imported songs. If they are bad, then you need to change and reimport. However, I don't think you will be disappointed.