DIY is what the channel used to be called, and is just used internally. As long as the guide data on the right side is correct, then all is well.
For some reason a group of channels that includes Magnolia stopped working with the 403 error message. I deleted the provider FUBO and did a rescan and got the channels back. For some reason it said Magnolia not authorized. I rescaned only Magnolia and it now works. This happens periodically withe same channels:
6107 Investigation Discovery HD
6109 Magnolia HD
6110 Science Channel HD
6111 American Heroes Channel HD
6112 Destination America HD
6113 Discovery Life Channel HD
6114 MOTORTREND HD
There is a glitch in something as FUBO has not deleted them from TVE.