I believe there is a bug in exporting of the M3U and XMLTV files from Channels DVR. Channels uses "'" which works for html formatting but not for XML formatting. Should actually be using "'". This causes channel names and guide data containing apostrophe's to appear cut off or sometimes completely lost.
I'm noticing it on export while I am using it as a source in Threadfin, but this most definitely has to be and issue in some other places.