dmwinsd, Thank you for bring this to our attention. If we haven't done so already, we do want to check the TV Activity Screen by pressing;
(50.0,52.0,54.0 remote) Options>TV Activity>See if there is an available tuner
(40.0 remote) Red Tab button> TV Activity> See if there is an available tuner
If there is, we want to update the guide by making sure that tuner stays open so the receiver can begin the process. You can also clear a tuner and Hard Reset the receiver by unplugging it for 10-15 seconds and plugging it back into the wall and allow the guide to update that way.