Duplicate chans

[TTL 10]

All 4 of these are for ESPN. Why are there so many duplicate chans in the epg?

CH 4140 on 119 12.311(V)
CH 4445 on 119 12.311(V)
CH 4780 on 119 12.370(V)
CH 9424 on 119 12.311(V)