I was just showing the kind of switch over I have where the dvb-s channels are numbered below 100 and all use DVB/ATSC EPG and the m3u channels are all numbered above 100 and use xmltv for a guide.
So channel 7 TVNZ2+1 uses the DVB/ATSC EPG guide (has overlap) and channel 107 Home Learning TV / TV2+1 uses the xmltv guide (no overlap).
(Tried emptying and re-doing the guide, no change).