There seems to be a problem with webepg and merged channels.

The initial grab goes fine but every next attempt will lead to that only the "second" channel of the two merged channels will get any new epg data. It looks like this is related to the checkboxes about deleting previous entries and more precisely the second one "but only if new programs overlap".

h4. Steps to Reproduce
- setup a merged channel
- make sure both the checkboxes about deleting old entries are checked
- set the grab days equal to one
- grab data
- check result in tvguide => everyting should be ok
- change grab days to two or more
- regrab data
- check result in tvguide => only the second channel got new epg data from the second grab

h4. Additional Information
See: http://forum.team-mediaportal.com/mediaportal-releases-315/webepg-merged-channels-72241/#post524301