You are sure you are not hearing vinyl "groove noise" there?
We were just discussing this the other day during the live show. Increasingly the latest crop of DJs, clubkids and other electronic music fanatics have been raised 100% digital and don't even know what vinyl sounds like when they hear it!
My guess is that Chillout remixes have generally lower levels than other genres, thus the pops and such are more noticeable than on the House or Trance channels.
(PS: Network latency cannot cause sound problems on MP3 / AAC+ streams because they come to you by TCP, which does not "drop" packets! So if you have latency on MP3 / AAC+ the streams will begin buffering instead. UDP can "drop" packets on WMA and affect sound, often less disruptively than continuous buffering though. However, you are not using WMA.)