this morning i turned on the tv and tuned to a local OTA channel and it showed a signal strength of 93 but gave me the yellow-loss of signal plate. so i go into the locals menu and it shows that i have good signal. well i delete all the locals and rescan. now all of the OTA locals just say DTV followed by the channel number, which is now the actual channel and shows no virtual channel like it had before. anyone else experiencing this? my receiver is a 722 with L618 software.